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classification_ss:"54.88 (Computer in der Freizeit)"
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classification_ss:"F 111"
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classification_ss:"MBK 6"
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type_ss:"m"
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Spitzer, M.: Digitale Demenz : wie wir uns und unsere Kinder um den Verstand bringen (2012)
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1.0 = *:*, product of: 1.0 = boost 1.0 = queryNorm