Document (#28457)

Author
Radev, D.
Fan, W.
Qu, H.
Wu, H.
Grewal, A.
Title
Probabilistic question answering on the Web
Source
Journal of the American Society for Information Science and Technology. 56(2005) no.6, S.571-583
Year
2005
Abstract
Web-based search engines such as Google and NorthernLight return documents that are relevant to a user query, not answers to user questions. We have developed an architecture that augments existing search engines so that they support natural language question answering. The process entails five steps: query modulation, document retrieval, passage extraction, phrase extraction, and answer ranking. In this article, we describe some probabilistic approaches to the last three of these stages. We show how our techniques apply to a number of existing search engines, and we also present results contrasting three different methods for question answering. Our algorithm, probabilistic phrase reranking (PPR), uses proximity and question type features and achieves a total reciprocal document rank of .20 an the TREC8 corpus. Our techniques have been implemented as a Web-accessible system, called NSIR.
Theme
Suchmaschinen
Retrievalalgorithmen
Computerlinguistik
Sprachretrieval
Object
NSIR

Similar documents (author)

  1. Otterbacher, J.; Radev, D.: Exploring fact-focused relevance and novelty detection (2008) 4.55
    4.5489707 = sum of:
      4.5489707 = weight(author_txt:radev in 4211) [ClassicSimilarity], result of:
        4.5489707 = fieldWeight in 4211, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.097941 = idf(docFreq=12, maxDocs=42740)
          0.5 = fieldNorm(doc=4211)
    
  2. Finegan-Dollak, C.; Radev, D.R.: Sentence simplification, compression, and disaggregation for summarization of sophisticated documents (2016) 3.98
    3.9803493 = sum of:
      3.9803493 = weight(author_txt:radev in 5123) [ClassicSimilarity], result of:
        3.9803493 = fieldWeight in 5123, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.097941 = idf(docFreq=12, maxDocs=42740)
          0.4375 = fieldNorm(doc=5123)
    
  3. Radev, D.R.; Libner, K.; Fan, W.: Getting answers to natural language questions on the Web (2002) 3.41
    3.411728 = sum of:
      3.411728 = weight(author_txt:radev in 205) [ClassicSimilarity], result of:
        3.411728 = fieldWeight in 205, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.097941 = idf(docFreq=12, maxDocs=42740)
          0.375 = fieldNorm(doc=205)
    
  4. Otterbacher, J.; Radev, D.; Kareem, O.: Hierarchical summarization for delivering information to mobile devices (2008) 3.41
    3.411728 = sum of:
      3.411728 = weight(author_txt:radev in 4072) [ClassicSimilarity], result of:
        3.411728 = fieldWeight in 4072, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.097941 = idf(docFreq=12, maxDocs=42740)
          0.375 = fieldNorm(doc=4072)
    
  5. Otterbacher, J.; Erkan, G.; Radev, D.R.: Biased LexRank : passage retrieval using random walks with question-based priors (2009) 3.41
    3.411728 = sum of:
      3.411728 = weight(author_txt:radev in 4451) [ClassicSimilarity], result of:
        3.411728 = fieldWeight in 4451, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.097941 = idf(docFreq=12, maxDocs=42740)
          0.375 = fieldNorm(doc=4451)
    

Similar documents (content)

  1. Lin, J.; Katz, B.: Building a reusable test collection for question answering (2006) 0.28
    0.27855337 = sum of:
      0.27855337 = product of:
        0.8704793 = sum of:
          0.02067085 = weight(abstract_txt:have in 46) [ClassicSimilarity], result of:
            0.02067085 = score(doc=46,freq=2.0), product of:
              0.057877038 = queryWeight, product of:
                1.0051844 = boost
                3.2325633 = idf(docFreq=4583, maxDocs=42740)
                0.017812034 = queryNorm
              0.35715115 = fieldWeight in 46, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.2325633 = idf(docFreq=4583, maxDocs=42740)
                0.078125 = fieldNorm(doc=46)
          0.015437784 = weight(abstract_txt:that in 46) [ClassicSimilarity], result of:
            0.015437784 = score(doc=46,freq=3.0), product of:
              0.04764208 = queryWeight, product of:
                1.1169496 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.017812034 = queryNorm
              0.32403675 = fieldWeight in 46, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.078125 = fieldNorm(doc=46)
          0.08224634 = weight(abstract_txt:return in 46) [ClassicSimilarity], result of:
            0.08224634 = score(doc=46,freq=1.0), product of:
              0.1453266 = queryWeight, product of:
                1.1262897 = boost
                7.24405 = idf(docFreq=82, maxDocs=42740)
                0.017812034 = queryNorm
              0.5659414 = fieldWeight in 46, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.24405 = idf(docFreq=82, maxDocs=42740)
                0.078125 = fieldNorm(doc=46)
          0.021561151 = weight(abstract_txt:user in 46) [ClassicSimilarity], result of:
            0.021561151 = score(doc=46,freq=1.0), product of:
              0.074999556 = queryWeight, product of:
                1.1442527 = boost
                3.6797917 = idf(docFreq=2930, maxDocs=42740)
                0.017812034 = queryNorm
              0.28748372 = fieldWeight in 46, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.6797917 = idf(docFreq=2930, maxDocs=42740)
                0.078125 = fieldNorm(doc=46)
          0.048004474 = weight(abstract_txt:document in 46) [ClassicSimilarity], result of:
            0.048004474 = score(doc=46,freq=2.0), product of:
              0.101497464 = queryWeight, product of:
                1.3311291 = boost
                4.280766 = idf(docFreq=1606, maxDocs=42740)
                0.017812034 = queryNorm
              0.4729623 = fieldWeight in 46, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.280766 = idf(docFreq=1606, maxDocs=42740)
                0.078125 = fieldNorm(doc=46)
          0.040108293 = weight(abstract_txt:techniques in 46) [ClassicSimilarity], result of:
            0.040108293 = score(doc=46,freq=1.0), product of:
              0.11344016 = queryWeight, product of:
                1.4072654 = boost
                4.525612 = idf(docFreq=1257, maxDocs=42740)
                0.017812034 = queryNorm
              0.35356343 = fieldWeight in 46, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.525612 = idf(docFreq=1257, maxDocs=42740)
                0.078125 = fieldNorm(doc=46)
          0.39416063 = weight(abstract_txt:answering in 46) [ClassicSimilarity], result of:
            0.39416063 = score(doc=46,freq=4.0), product of:
              0.3753214 = queryWeight, product of:
                3.135017 = boost
                6.721248 = idf(docFreq=139, maxDocs=42740)
                0.017812034 = queryNorm
              1.050195 = fieldWeight in 46, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                6.721248 = idf(docFreq=139, maxDocs=42740)
                0.078125 = fieldNorm(doc=46)
          0.24828976 = weight(abstract_txt:question in 46) [ClassicSimilarity], result of:
            0.24828976 = score(doc=46,freq=4.0), product of:
              0.30355677 = queryWeight, product of:
                3.2555737 = boost
                5.234785 = idf(docFreq=618, maxDocs=42740)
                0.017812034 = queryNorm
              0.81793517 = fieldWeight in 46, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.234785 = idf(docFreq=618, maxDocs=42740)
                0.078125 = fieldNorm(doc=46)
        0.32 = coord(8/25)
    
  2. Habernal, I.; Konopík, M.; Rohlík, O.: Question answering (2012) 0.22
    0.21891433 = sum of:
      0.21891433 = product of:
        0.91214305 = sum of:
          0.008913009 = weight(abstract_txt:that in 2102) [ClassicSimilarity], result of:
            0.008913009 = score(doc=2102,freq=1.0), product of:
              0.04764208 = queryWeight, product of:
                1.1169496 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.017812034 = queryNorm
              0.18708271 = fieldWeight in 2102, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.078125 = fieldNorm(doc=2102)
          0.05672169 = weight(abstract_txt:techniques in 2102) [ClassicSimilarity], result of:
            0.05672169 = score(doc=2102,freq=2.0), product of:
              0.11344016 = queryWeight, product of:
                1.4072654 = boost
                4.525612 = idf(docFreq=1257, maxDocs=42740)
                0.017812034 = queryNorm
              0.5000142 = fieldWeight in 2102, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.525612 = idf(docFreq=1257, maxDocs=42740)
                0.078125 = fieldNorm(doc=2102)
          0.0316024 = weight(abstract_txt:search in 2102) [ClassicSimilarity], result of:
            0.0316024 = score(doc=2102,freq=1.0), product of:
              0.110778265 = queryWeight, product of:
                1.7031994 = boost
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.017812034 = queryNorm
              0.2852762 = fieldWeight in 2102, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.078125 = fieldNorm(doc=2102)
          0.09662451 = weight(abstract_txt:engines in 2102) [ClassicSimilarity], result of:
            0.09662451 = score(doc=2102,freq=1.0), product of:
              0.23336336 = queryWeight, product of:
                2.4720347 = boost
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.017812034 = queryNorm
              0.41405174 = fieldWeight in 2102, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.078125 = fieldNorm(doc=2102)
          0.44068503 = weight(abstract_txt:answering in 2102) [ClassicSimilarity], result of:
            0.44068503 = score(doc=2102,freq=5.0), product of:
              0.3753214 = queryWeight, product of:
                3.135017 = boost
                6.721248 = idf(docFreq=139, maxDocs=42740)
                0.017812034 = queryNorm
              1.1741538 = fieldWeight in 2102, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                6.721248 = idf(docFreq=139, maxDocs=42740)
                0.078125 = fieldNorm(doc=2102)
          0.2775964 = weight(abstract_txt:question in 2102) [ClassicSimilarity], result of:
            0.2775964 = score(doc=2102,freq=5.0), product of:
              0.30355677 = queryWeight, product of:
                3.2555737 = boost
                5.234785 = idf(docFreq=618, maxDocs=42740)
                0.017812034 = queryNorm
              0.9144794 = fieldWeight in 2102, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                5.234785 = idf(docFreq=618, maxDocs=42740)
                0.078125 = fieldNorm(doc=2102)
        0.24 = coord(6/25)
    
  3. Zhang, Z.; Li, Q.; Zeng, D.; Ga, H.: Extracting evolutionary communities in community question answering (2014) 0.21
    0.21031421 = sum of:
      0.21031421 = product of:
        0.6572319 = sum of:
          0.011693199 = weight(abstract_txt:have in 3287) [ClassicSimilarity], result of:
            0.011693199 = score(doc=3287,freq=1.0), product of:
              0.057877038 = queryWeight, product of:
                1.0051844 = boost
                3.2325633 = idf(docFreq=4583, maxDocs=42740)
                0.017812034 = queryNorm
              0.2020352 = fieldWeight in 3287, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.2325633 = idf(docFreq=4583, maxDocs=42740)
                0.0625 = fieldNorm(doc=3287)
          0.014260814 = weight(abstract_txt:that in 3287) [ClassicSimilarity], result of:
            0.014260814 = score(doc=3287,freq=4.0), product of:
              0.04764208 = queryWeight, product of:
                1.1169496 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.017812034 = queryNorm
              0.29933232 = fieldWeight in 3287, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.0625 = fieldNorm(doc=3287)
          0.017248921 = weight(abstract_txt:user in 3287) [ClassicSimilarity], result of:
            0.017248921 = score(doc=3287,freq=1.0), product of:
              0.074999556 = queryWeight, product of:
                1.1442527 = boost
                3.6797917 = idf(docFreq=2930, maxDocs=42740)
                0.017812034 = queryNorm
              0.22998698 = fieldWeight in 3287, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.6797917 = idf(docFreq=2930, maxDocs=42740)
                0.0625 = fieldNorm(doc=3287)
          0.035933767 = weight(abstract_txt:existing in 3287) [ClassicSimilarity], result of:
            0.035933767 = score(doc=3287,freq=1.0), product of:
              0.122335516 = queryWeight, product of:
                1.4613992 = boost
                4.6997004 = idf(docFreq=1056, maxDocs=42740)
                0.017812034 = queryNorm
              0.29373127 = fieldWeight in 3287, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.6997004 = idf(docFreq=1056, maxDocs=42740)
                0.0625 = fieldNorm(doc=3287)
          0.11759054 = weight(abstract_txt:extraction in 3287) [ClassicSimilarity], result of:
            0.11759054 = score(doc=3287,freq=2.0), product of:
              0.21402064 = queryWeight, product of:
                1.9329491 = boost
                6.216153 = idf(docFreq=231, maxDocs=42740)
                0.017812034 = queryNorm
              0.5494355 = fieldWeight in 3287, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.216153 = idf(docFreq=231, maxDocs=42740)
                0.0625 = fieldNorm(doc=3287)
          0.15766425 = weight(abstract_txt:answering in 3287) [ClassicSimilarity], result of:
            0.15766425 = score(doc=3287,freq=1.0), product of:
              0.3753214 = queryWeight, product of:
                3.135017 = boost
                6.721248 = idf(docFreq=139, maxDocs=42740)
                0.017812034 = queryNorm
              0.420078 = fieldWeight in 3287, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.721248 = idf(docFreq=139, maxDocs=42740)
                0.0625 = fieldNorm(doc=3287)
          0.16238655 = weight(abstract_txt:probabilistic in 3287) [ClassicSimilarity], result of:
            0.16238655 = score(doc=3287,freq=1.0), product of:
              0.38277876 = queryWeight, product of:
                3.166009 = boost
                6.787693 = idf(docFreq=130, maxDocs=42740)
                0.017812034 = queryNorm
              0.4242308 = fieldWeight in 3287, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.787693 = idf(docFreq=130, maxDocs=42740)
                0.0625 = fieldNorm(doc=3287)
          0.14045389 = weight(abstract_txt:question in 3287) [ClassicSimilarity], result of:
            0.14045389 = score(doc=3287,freq=2.0), product of:
              0.30355677 = queryWeight, product of:
                3.2555737 = boost
                5.234785 = idf(docFreq=618, maxDocs=42740)
                0.017812034 = queryNorm
              0.462694 = fieldWeight in 3287, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.234785 = idf(docFreq=618, maxDocs=42740)
                0.0625 = fieldNorm(doc=3287)
        0.32 = coord(8/25)
    
  4. Radev, D.R.; Libner, K.; Fan, W.: Getting answers to natural language questions on the Web (2002) 0.21
    0.20930642 = sum of:
      0.20930642 = product of:
        0.6540826 = sum of:
          0.011693199 = weight(abstract_txt:have in 205) [ClassicSimilarity], result of:
            0.011693199 = score(doc=205,freq=1.0), product of:
              0.057877038 = queryWeight, product of:
                1.0051844 = boost
                3.2325633 = idf(docFreq=4583, maxDocs=42740)
                0.017812034 = queryNorm
              0.2020352 = fieldWeight in 205, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.2325633 = idf(docFreq=4583, maxDocs=42740)
                0.0625 = fieldNorm(doc=205)
          0.007130407 = weight(abstract_txt:that in 205) [ClassicSimilarity], result of:
            0.007130407 = score(doc=205,freq=1.0), product of:
              0.04764208 = queryWeight, product of:
                1.1169496 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.017812034 = queryNorm
              0.14966616 = fieldWeight in 205, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.0625 = fieldNorm(doc=205)
          0.10901483 = weight(abstract_txt:reciprocal in 205) [ClassicSimilarity], result of:
            0.10901483 = score(doc=205,freq=1.0), product of:
              0.2034844 = queryWeight, product of:
                1.332733 = boost
                8.571848 = idf(docFreq=21, maxDocs=42740)
                0.017812034 = queryNorm
              0.5357405 = fieldWeight in 205, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.571848 = idf(docFreq=21, maxDocs=42740)
                0.0625 = fieldNorm(doc=205)
          0.051918194 = weight(abstract_txt:query in 205) [ClassicSimilarity], result of:
            0.051918194 = score(doc=205,freq=2.0), product of:
              0.12409485 = queryWeight, product of:
                1.4718701 = boost
                4.7333736 = idf(docFreq=1021, maxDocs=42740)
                0.017812034 = queryNorm
              0.41837507 = fieldWeight in 205, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.7333736 = idf(docFreq=1021, maxDocs=42740)
                0.0625 = fieldNorm(doc=205)
          0.06688968 = weight(abstract_txt:search in 205) [ClassicSimilarity], result of:
            0.06688968 = score(doc=205,freq=7.0), product of:
              0.110778265 = queryWeight, product of:
                1.7031994 = boost
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.017812034 = queryNorm
              0.6038159 = fieldWeight in 205, product of:
                2.6457512 = tf(freq=7.0), with freq of:
                  7.0 = termFreq=7.0
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.0625 = fieldNorm(doc=205)
          0.10931815 = weight(abstract_txt:engines in 205) [ClassicSimilarity], result of:
            0.10931815 = score(doc=205,freq=2.0), product of:
              0.23336336 = queryWeight, product of:
                2.4720347 = boost
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.017812034 = queryNorm
              0.46844608 = fieldWeight in 205, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.0625 = fieldNorm(doc=205)
          0.15766425 = weight(abstract_txt:answering in 205) [ClassicSimilarity], result of:
            0.15766425 = score(doc=205,freq=1.0), product of:
              0.3753214 = queryWeight, product of:
                3.135017 = boost
                6.721248 = idf(docFreq=139, maxDocs=42740)
                0.017812034 = queryNorm
              0.420078 = fieldWeight in 205, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.721248 = idf(docFreq=139, maxDocs=42740)
                0.0625 = fieldNorm(doc=205)
          0.14045389 = weight(abstract_txt:question in 205) [ClassicSimilarity], result of:
            0.14045389 = score(doc=205,freq=2.0), product of:
              0.30355677 = queryWeight, product of:
                3.2555737 = boost
                5.234785 = idf(docFreq=618, maxDocs=42740)
                0.017812034 = queryNorm
              0.462694 = fieldWeight in 205, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.234785 = idf(docFreq=618, maxDocs=42740)
                0.0625 = fieldNorm(doc=205)
        0.32 = coord(8/25)
    
  5. Yeganova, L.; Comeau, D.C.; Kim, W.; Wilbur, W.J.: How to interpret PubMed queries and why it matters (2009) 0.20
    0.19819726 = sum of:
      0.19819726 = product of:
        0.61936647 = sum of:
          0.015944075 = weight(abstract_txt:that in 4713) [ClassicSimilarity], result of:
            0.015944075 = score(doc=4713,freq=5.0), product of:
              0.04764208 = queryWeight, product of:
                1.1169496 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.017812034 = queryNorm
              0.33466372 = fieldWeight in 4713, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.0625 = fieldNorm(doc=4713)
          0.09351898 = weight(abstract_txt:proximity in 4713) [ClassicSimilarity], result of:
            0.09351898 = score(doc=4713,freq=2.0), product of:
              0.14581333 = queryWeight, product of:
                1.1281743 = boost
                7.256171 = idf(docFreq=81, maxDocs=42740)
                0.017812034 = queryNorm
              0.641361 = fieldWeight in 4713, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                7.256171 = idf(docFreq=81, maxDocs=42740)
                0.0625 = fieldNorm(doc=4713)
          0.032086633 = weight(abstract_txt:techniques in 4713) [ClassicSimilarity], result of:
            0.032086633 = score(doc=4713,freq=1.0), product of:
              0.11344016 = queryWeight, product of:
                1.4072654 = boost
                4.525612 = idf(docFreq=1257, maxDocs=42740)
                0.017812034 = queryNorm
              0.28285074 = fieldWeight in 4713, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.525612 = idf(docFreq=1257, maxDocs=42740)
                0.0625 = fieldNorm(doc=4713)
          0.051918194 = weight(abstract_txt:query in 4713) [ClassicSimilarity], result of:
            0.051918194 = score(doc=4713,freq=2.0), product of:
              0.12409485 = queryWeight, product of:
                1.4718701 = boost
                4.7333736 = idf(docFreq=1021, maxDocs=42740)
                0.017812034 = queryNorm
              0.41837507 = fieldWeight in 4713, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.7333736 = idf(docFreq=1021, maxDocs=42740)
                0.0625 = fieldNorm(doc=4713)
          0.03575404 = weight(abstract_txt:search in 4713) [ClassicSimilarity], result of:
            0.03575404 = score(doc=4713,freq=2.0), product of:
              0.110778265 = queryWeight, product of:
                1.7031994 = boost
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.017812034 = queryNorm
              0.3227532 = fieldWeight in 4713, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.0625 = fieldNorm(doc=4713)
          0.21352905 = weight(abstract_txt:phrase in 4713) [ClassicSimilarity], result of:
            0.21352905 = score(doc=4713,freq=3.0), product of:
              0.27827975 = queryWeight, product of:
                2.2041106 = boost
                7.0881796 = idf(docFreq=96, maxDocs=42740)
                0.017812034 = queryNorm
              0.76731795 = fieldWeight in 4713, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                7.0881796 = idf(docFreq=96, maxDocs=42740)
                0.0625 = fieldNorm(doc=4713)
          0.0772996 = weight(abstract_txt:engines in 4713) [ClassicSimilarity], result of:
            0.0772996 = score(doc=4713,freq=1.0), product of:
              0.23336336 = queryWeight, product of:
                2.4720347 = boost
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.017812034 = queryNorm
              0.3312414 = fieldWeight in 4713, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.0625 = fieldNorm(doc=4713)
          0.099315904 = weight(abstract_txt:question in 4713) [ClassicSimilarity], result of:
            0.099315904 = score(doc=4713,freq=1.0), product of:
              0.30355677 = queryWeight, product of:
                3.2555737 = boost
                5.234785 = idf(docFreq=618, maxDocs=42740)
                0.017812034 = queryNorm
              0.32717407 = fieldWeight in 4713, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.234785 = idf(docFreq=618, maxDocs=42740)
                0.0625 = fieldNorm(doc=4713)
        0.32 = coord(8/25)