Document (#41677)

Author
Juola, P.
Mikros, G.K.
Vinsick, S.
Title
¬A comparative assessment of the difficulty of authorship attribution in Greek and in English
Source
Journal of the Association for Information Science and Technology. 70(2019) no.1, S.61-70
Year
2019
Abstract
Authorship attribution is an important problem in text classification, with many applications and a substantial body of research activity. Among the research findings are that many different methods will work, including a number of methods that are superficially language-independent (such as an analysis of the most common "words" or "character n-grams" in a document). Since all languages have words (and all written languages have characters), this method could (in theory) work on any language. However, it is not clear that the methods that work best on, for example English, would also work best on other languages. It is not even clear that the same level of performance is achievable in different languages, even under identical conditions. Unfortunately, it is very difficult to achieve "identical conditions" in practice. A new corpus, developed by George Mikros, provides very tight controls not only for author but also for topic, thus enabling a direct comparison of performance levels between the two languages Greek and English. We compare a number of different methods head-to-head on this corpus, and show that, overall, performance on English is higher than performance on Greek, often highly significantly so.
Content
Vgl.: https://onlinelibrary.wiley.com/doi/10.1002/asi.24073.
Theme
Formalerschließung

Similar documents (content)

  1. Kocher, M.; Savoy, J.: ¬A simple and efficient algorithm for authorship verification (2017) 0.42
    0.41512758 = sum of:
      0.41512758 = product of:
        1.0378189 = sum of:
          0.061190344 = weight(abstract_txt:best in 3330) [ClassicSimilarity], result of:
            0.061190344 = score(doc=3330,freq=2.0), product of:
              0.110412315 = queryWeight, product of:
                1.2093107 = boost
                5.0160327 = idf(docFreq=796, maxDocs=44218)
                0.018202007 = queryNorm
              0.55419856 = fieldWeight in 3330, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.0160327 = idf(docFreq=796, maxDocs=44218)
                0.078125 = fieldNorm(doc=3330)
          0.05258722 = weight(abstract_txt:words in 3330) [ClassicSimilarity], result of:
            0.05258722 = score(doc=3330,freq=1.0), product of:
              0.12574548 = queryWeight, product of:
                1.2905514 = boost
                5.353007 = idf(docFreq=568, maxDocs=44218)
                0.018202007 = queryNorm
              0.41820365 = fieldWeight in 3330, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.353007 = idf(docFreq=568, maxDocs=44218)
                0.078125 = fieldNorm(doc=3330)
          0.025326686 = weight(abstract_txt:different in 3330) [ClassicSimilarity], result of:
            0.025326686 = score(doc=3330,freq=1.0), product of:
              0.08844125 = queryWeight, product of:
                1.3255686 = boost
                3.6655018 = idf(docFreq=3075, maxDocs=44218)
                0.018202007 = queryNorm
              0.28636733 = fieldWeight in 3330, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.6655018 = idf(docFreq=3075, maxDocs=44218)
                0.078125 = fieldNorm(doc=3330)
          0.11650705 = weight(abstract_txt:authorship in 3330) [ClassicSimilarity], result of:
            0.11650705 = score(doc=3330,freq=1.0), product of:
              0.21370125 = queryWeight, product of:
                1.6824131 = boost
                6.9783883 = idf(docFreq=111, maxDocs=44218)
                0.018202007 = queryNorm
              0.5451866 = fieldWeight in 3330, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.9783883 = idf(docFreq=111, maxDocs=44218)
                0.078125 = fieldNorm(doc=3330)
          0.013682471 = weight(abstract_txt:that in 3330) [ClassicSimilarity], result of:
            0.013682471 = score(doc=3330,freq=1.0), product of:
              0.073913254 = queryWeight, product of:
                1.7137635 = boost
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.018202007 = queryNorm
              0.18511525 = fieldWeight in 3330, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.078125 = fieldNorm(doc=3330)
          0.168405 = weight(abstract_txt:attribution in 3330) [ClassicSimilarity], result of:
            0.168405 = score(doc=3330,freq=1.0), product of:
              0.27319676 = queryWeight, product of:
                1.902247 = boost
                7.890225 = idf(docFreq=44, maxDocs=44218)
                0.018202007 = queryNorm
              0.61642385 = fieldWeight in 3330, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.890225 = idf(docFreq=44, maxDocs=44218)
                0.078125 = fieldNorm(doc=3330)
          0.06807349 = weight(abstract_txt:performance in 3330) [ClassicSimilarity], result of:
            0.06807349 = score(doc=3330,freq=1.0), product of:
              0.18817744 = queryWeight, product of:
                2.2326872 = boost
                4.63042 = idf(docFreq=1171, maxDocs=44218)
                0.018202007 = queryNorm
              0.3617516 = fieldWeight in 3330, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.63042 = idf(docFreq=1171, maxDocs=44218)
                0.078125 = fieldNorm(doc=3330)
          0.118770845 = weight(abstract_txt:english in 3330) [ClassicSimilarity], result of:
            0.118770845 = score(doc=3330,freq=1.0), product of:
              0.27272323 = queryWeight, product of:
                2.687851 = boost
                5.574394 = idf(docFreq=455, maxDocs=44218)
                0.018202007 = queryNorm
              0.43549955 = fieldWeight in 3330, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.574394 = idf(docFreq=455, maxDocs=44218)
                0.078125 = fieldNorm(doc=3330)
          0.29358613 = weight(abstract_txt:greek in 3330) [ClassicSimilarity], result of:
            0.29358613 = score(doc=3330,freq=1.0), product of:
              0.4529946 = queryWeight, product of:
                3.0 = boost
                8.29569 = idf(docFreq=29, maxDocs=44218)
                0.018202007 = queryNorm
              0.64810073 = fieldWeight in 3330, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.29569 = idf(docFreq=29, maxDocs=44218)
                0.078125 = fieldNorm(doc=3330)
          0.119689584 = weight(abstract_txt:languages in 3330) [ClassicSimilarity], result of:
            0.119689584 = score(doc=3330,freq=1.0), product of:
              0.29529527 = queryWeight, product of:
                3.1269963 = boost
                5.188118 = idf(docFreq=670, maxDocs=44218)
                0.018202007 = queryNorm
              0.40532172 = fieldWeight in 3330, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.188118 = idf(docFreq=670, maxDocs=44218)
                0.078125 = fieldNorm(doc=3330)
        0.4 = coord(10/25)
    
  2. Stamatatos, E.: Masking topic-related information to enhance authorship attribution (2018) 0.27
    0.26705903 = sum of:
      0.26705903 = product of:
        0.8345595 = sum of:
          0.03269451 = weight(abstract_txt:very in 4124) [ClassicSimilarity], result of:
            0.03269451 = score(doc=4124,freq=1.0), product of:
              0.10629075 = queryWeight, product of:
                1.1865249 = boost
                4.921521 = idf(docFreq=875, maxDocs=44218)
                0.018202007 = queryNorm
              0.30759507 = fieldWeight in 4124, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.921521 = idf(docFreq=875, maxDocs=44218)
                0.0625 = fieldNorm(doc=4124)
          0.056704056 = weight(abstract_txt:clear in 4124) [ClassicSimilarity], result of:
            0.056704056 = score(doc=4124,freq=1.0), product of:
              0.15343402 = queryWeight, product of:
                1.4255745 = boost
                5.913062 = idf(docFreq=324, maxDocs=44218)
                0.018202007 = queryNorm
              0.36956638 = fieldWeight in 4124, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.913062 = idf(docFreq=324, maxDocs=44218)
                0.0625 = fieldNorm(doc=4124)
          0.062206887 = weight(abstract_txt:corpus in 4124) [ClassicSimilarity], result of:
            0.062206887 = score(doc=4124,freq=1.0), product of:
              0.16320667 = queryWeight, product of:
                1.4702733 = boost
                6.0984654 = idf(docFreq=269, maxDocs=44218)
                0.018202007 = queryNorm
              0.3811541 = fieldWeight in 4124, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.0984654 = idf(docFreq=269, maxDocs=44218)
                0.0625 = fieldNorm(doc=4124)
          0.1614369 = weight(abstract_txt:authorship in 4124) [ClassicSimilarity], result of:
            0.1614369 = score(doc=4124,freq=3.0), product of:
              0.21370125 = queryWeight, product of:
                1.6824131 = boost
                6.9783883 = idf(docFreq=111, maxDocs=44218)
                0.018202007 = queryNorm
              0.75543267 = fieldWeight in 4124, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                6.9783883 = idf(docFreq=111, maxDocs=44218)
                0.0625 = fieldNorm(doc=4124)
          0.018958986 = weight(abstract_txt:that in 4124) [ClassicSimilarity], result of:
            0.018958986 = score(doc=4124,freq=3.0), product of:
              0.073913254 = queryWeight, product of:
                1.7137635 = boost
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.018202007 = queryNorm
              0.2565032 = fieldWeight in 4124, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.0625 = fieldNorm(doc=4124)
          0.33000505 = weight(abstract_txt:attribution in 4124) [ClassicSimilarity], result of:
            0.33000505 = score(doc=4124,freq=6.0), product of:
              0.27319676 = queryWeight, product of:
                1.902247 = boost
                7.890225 = idf(docFreq=44, maxDocs=44218)
                0.018202007 = queryNorm
              1.2079391 = fieldWeight in 4124, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                7.890225 = idf(docFreq=44, maxDocs=44218)
                0.0625 = fieldNorm(doc=4124)
          0.078227766 = weight(abstract_txt:methods in 4124) [ClassicSimilarity], result of:
            0.078227766 = score(doc=4124,freq=4.0), product of:
              0.15091863 = queryWeight, product of:
                1.999473 = boost
                4.146752 = idf(docFreq=1900, maxDocs=44218)
                0.018202007 = queryNorm
              0.518344 = fieldWeight in 4124, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.146752 = idf(docFreq=1900, maxDocs=44218)
                0.0625 = fieldNorm(doc=4124)
          0.09432538 = weight(abstract_txt:performance in 4124) [ClassicSimilarity], result of:
            0.09432538 = score(doc=4124,freq=3.0), product of:
              0.18817744 = queryWeight, product of:
                2.2326872 = boost
                4.63042 = idf(docFreq=1171, maxDocs=44218)
                0.018202007 = queryNorm
              0.50125766 = fieldWeight in 4124, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.63042 = idf(docFreq=1171, maxDocs=44218)
                0.0625 = fieldNorm(doc=4124)
        0.32 = coord(8/25)
    
  3. Adamovic, S.; Miskovic, V.; Milosavljevic, M.; Sarac, M.; Veinovic, M.: Automated language-independent authorship verification (for Indo-European languages) : facilitating adaptive visual exploration of scientific publications by citation links (2019) 0.26
    0.2617264 = sum of:
      0.2617264 = product of:
        0.81789505 = sum of:
          0.034746952 = weight(abstract_txt:language in 5327) [ClassicSimilarity], result of:
            0.034746952 = score(doc=5327,freq=3.0), product of:
              0.07675081 = queryWeight, product of:
                1.0082555 = boost
                4.1820874 = idf(docFreq=1834, maxDocs=44218)
                0.018202007 = queryNorm
              0.45272425 = fieldWeight in 5327, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.1820874 = idf(docFreq=1834, maxDocs=44218)
                0.0625 = fieldNorm(doc=5327)
          0.02026135 = weight(abstract_txt:different in 5327) [ClassicSimilarity], result of:
            0.02026135 = score(doc=5327,freq=1.0), product of:
              0.08844125 = queryWeight, product of:
                1.3255686 = boost
                3.6655018 = idf(docFreq=3075, maxDocs=44218)
                0.018202007 = queryNorm
              0.22909386 = fieldWeight in 5327, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.6655018 = idf(docFreq=3075, maxDocs=44218)
                0.0625 = fieldNorm(doc=5327)
          0.20841415 = weight(abstract_txt:authorship in 5327) [ClassicSimilarity], result of:
            0.20841415 = score(doc=5327,freq=5.0), product of:
              0.21370125 = queryWeight, product of:
                1.6824131 = boost
                6.9783883 = idf(docFreq=111, maxDocs=44218)
                0.018202007 = queryNorm
              0.9752594 = fieldWeight in 5327, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                6.9783883 = idf(docFreq=111, maxDocs=44218)
                0.0625 = fieldNorm(doc=5327)
          0.010945976 = weight(abstract_txt:that in 5327) [ClassicSimilarity], result of:
            0.010945976 = score(doc=5327,freq=1.0), product of:
              0.073913254 = queryWeight, product of:
                1.7137635 = boost
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.018202007 = queryNorm
              0.1480922 = fieldWeight in 5327, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.0625 = fieldNorm(doc=5327)
          0.078227766 = weight(abstract_txt:methods in 5327) [ClassicSimilarity], result of:
            0.078227766 = score(doc=5327,freq=4.0), product of:
              0.15091863 = queryWeight, product of:
                1.999473 = boost
                4.146752 = idf(docFreq=1900, maxDocs=44218)
                0.018202007 = queryNorm
              0.518344 = fieldWeight in 5327, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.146752 = idf(docFreq=1900, maxDocs=44218)
                0.0625 = fieldNorm(doc=5327)
          0.09501667 = weight(abstract_txt:english in 5327) [ClassicSimilarity], result of:
            0.09501667 = score(doc=5327,freq=1.0), product of:
              0.27272323 = queryWeight, product of:
                2.687851 = boost
                5.574394 = idf(docFreq=455, maxDocs=44218)
                0.018202007 = queryNorm
              0.34839964 = fieldWeight in 5327, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.574394 = idf(docFreq=455, maxDocs=44218)
                0.0625 = fieldNorm(doc=5327)
          0.23486891 = weight(abstract_txt:greek in 5327) [ClassicSimilarity], result of:
            0.23486891 = score(doc=5327,freq=1.0), product of:
              0.4529946 = queryWeight, product of:
                3.0 = boost
                8.29569 = idf(docFreq=29, maxDocs=44218)
                0.018202007 = queryNorm
              0.5184806 = fieldWeight in 5327, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.29569 = idf(docFreq=29, maxDocs=44218)
                0.0625 = fieldNorm(doc=5327)
          0.1354133 = weight(abstract_txt:languages in 5327) [ClassicSimilarity], result of:
            0.1354133 = score(doc=5327,freq=2.0), product of:
              0.29529527 = queryWeight, product of:
                3.1269963 = boost
                5.188118 = idf(docFreq=670, maxDocs=44218)
                0.018202007 = queryNorm
              0.45856917 = fieldWeight in 5327, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.188118 = idf(docFreq=670, maxDocs=44218)
                0.0625 = fieldNorm(doc=5327)
        0.32 = coord(8/25)
    
  4. Teich, E.; Degaetano-Ortlieb, S.; Fankhauser, P.; Kermes, H.; Lapshinova-Koltunski, E.: ¬The linguistic construal of disciplinarity : a data-mining approach using register features (2016) 0.24
    0.24233516 = sum of:
      0.24233516 = product of:
        0.7572974 = sum of:
          0.035463456 = weight(abstract_txt:language in 3015) [ClassicSimilarity], result of:
            0.035463456 = score(doc=3015,freq=2.0), product of:
              0.07675081 = queryWeight, product of:
                1.0082555 = boost
                4.1820874 = idf(docFreq=1834, maxDocs=44218)
                0.018202007 = queryNorm
              0.46205974 = fieldWeight in 3015, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.1820874 = idf(docFreq=1834, maxDocs=44218)
                0.078125 = fieldNorm(doc=3015)
          0.10996729 = weight(abstract_txt:corpus in 3015) [ClassicSimilarity], result of:
            0.10996729 = score(doc=3015,freq=2.0), product of:
              0.16320667 = queryWeight, product of:
                1.4702733 = boost
                6.0984654 = idf(docFreq=269, maxDocs=44218)
                0.018202007 = queryNorm
              0.67379165 = fieldWeight in 3015, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.0984654 = idf(docFreq=269, maxDocs=44218)
                0.078125 = fieldNorm(doc=3015)
          0.11650705 = weight(abstract_txt:authorship in 3015) [ClassicSimilarity], result of:
            0.11650705 = score(doc=3015,freq=1.0), product of:
              0.21370125 = queryWeight, product of:
                1.6824131 = boost
                6.9783883 = idf(docFreq=111, maxDocs=44218)
                0.018202007 = queryNorm
              0.5451866 = fieldWeight in 3015, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.9783883 = idf(docFreq=111, maxDocs=44218)
                0.078125 = fieldNorm(doc=3015)
          0.019349935 = weight(abstract_txt:that in 3015) [ClassicSimilarity], result of:
            0.019349935 = score(doc=3015,freq=2.0), product of:
              0.073913254 = queryWeight, product of:
                1.7137635 = boost
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.018202007 = queryNorm
              0.26179248 = fieldWeight in 3015, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.078125 = fieldNorm(doc=3015)
          0.168405 = weight(abstract_txt:attribution in 3015) [ClassicSimilarity], result of:
            0.168405 = score(doc=3015,freq=1.0), product of:
              0.27319676 = queryWeight, product of:
                1.902247 = boost
                7.890225 = idf(docFreq=44, maxDocs=44218)
                0.018202007 = queryNorm
              0.61642385 = fieldWeight in 3015, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.890225 = idf(docFreq=44, maxDocs=44218)
                0.078125 = fieldNorm(doc=3015)
          0.069144234 = weight(abstract_txt:methods in 3015) [ClassicSimilarity], result of:
            0.069144234 = score(doc=3015,freq=2.0), product of:
              0.15091863 = queryWeight, product of:
                1.999473 = boost
                4.146752 = idf(docFreq=1900, maxDocs=44218)
                0.018202007 = queryNorm
              0.4581557 = fieldWeight in 3015, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.146752 = idf(docFreq=1900, maxDocs=44218)
                0.078125 = fieldNorm(doc=3015)
          0.118770845 = weight(abstract_txt:english in 3015) [ClassicSimilarity], result of:
            0.118770845 = score(doc=3015,freq=1.0), product of:
              0.27272323 = queryWeight, product of:
                2.687851 = boost
                5.574394 = idf(docFreq=455, maxDocs=44218)
                0.018202007 = queryNorm
              0.43549955 = fieldWeight in 3015, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.574394 = idf(docFreq=455, maxDocs=44218)
                0.078125 = fieldNorm(doc=3015)
          0.119689584 = weight(abstract_txt:languages in 3015) [ClassicSimilarity], result of:
            0.119689584 = score(doc=3015,freq=1.0), product of:
              0.29529527 = queryWeight, product of:
                3.1269963 = boost
                5.188118 = idf(docFreq=670, maxDocs=44218)
                0.018202007 = queryNorm
              0.40532172 = fieldWeight in 3015, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.188118 = idf(docFreq=670, maxDocs=44218)
                0.078125 = fieldNorm(doc=3015)
        0.32 = coord(8/25)
    
  5. Karakos, A.: Greeklish : an experimental interface for automatic transliteration (2003) 0.23
    0.22632094 = sum of:
      0.22632094 = product of:
        0.94300395 = sum of:
          0.05258722 = weight(abstract_txt:words in 1820) [ClassicSimilarity], result of:
            0.05258722 = score(doc=1820,freq=1.0), product of:
              0.12574548 = queryWeight, product of:
                1.2905514 = boost
                5.353007 = idf(docFreq=568, maxDocs=44218)
                0.018202007 = queryNorm
              0.41820365 = fieldWeight in 1820, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.353007 = idf(docFreq=568, maxDocs=44218)
                0.078125 = fieldNorm(doc=1820)
          0.025326686 = weight(abstract_txt:different in 1820) [ClassicSimilarity], result of:
            0.025326686 = score(doc=1820,freq=1.0), product of:
              0.08844125 = queryWeight, product of:
                1.3255686 = boost
                3.6655018 = idf(docFreq=3075, maxDocs=44218)
                0.018202007 = queryNorm
              0.28636733 = fieldWeight in 1820, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.6655018 = idf(docFreq=3075, maxDocs=44218)
                0.078125 = fieldNorm(doc=1820)
          0.019349935 = weight(abstract_txt:that in 1820) [ClassicSimilarity], result of:
            0.019349935 = score(doc=1820,freq=2.0), product of:
              0.073913254 = queryWeight, product of:
                1.7137635 = boost
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.018202007 = queryNorm
              0.26179248 = fieldWeight in 1820, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.078125 = fieldNorm(doc=1820)
          0.16796733 = weight(abstract_txt:english in 1820) [ClassicSimilarity], result of:
            0.16796733 = score(doc=1820,freq=2.0), product of:
              0.27272323 = queryWeight, product of:
                2.687851 = boost
                5.574394 = idf(docFreq=455, maxDocs=44218)
                0.018202007 = queryNorm
              0.6158894 = fieldWeight in 1820, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.574394 = idf(docFreq=455, maxDocs=44218)
                0.078125 = fieldNorm(doc=1820)
          0.5085061 = weight(abstract_txt:greek in 1820) [ClassicSimilarity], result of:
            0.5085061 = score(doc=1820,freq=3.0), product of:
              0.4529946 = queryWeight, product of:
                3.0 = boost
                8.29569 = idf(docFreq=29, maxDocs=44218)
                0.018202007 = queryNorm
              1.1225435 = fieldWeight in 1820, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                8.29569 = idf(docFreq=29, maxDocs=44218)
                0.078125 = fieldNorm(doc=1820)
          0.16926663 = weight(abstract_txt:languages in 1820) [ClassicSimilarity], result of:
            0.16926663 = score(doc=1820,freq=2.0), product of:
              0.29529527 = queryWeight, product of:
                3.1269963 = boost
                5.188118 = idf(docFreq=670, maxDocs=44218)
                0.018202007 = queryNorm
              0.57321143 = fieldWeight in 1820, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.188118 = idf(docFreq=670, maxDocs=44218)
                0.078125 = fieldNorm(doc=1820)
        0.24 = coord(6/25)