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Table 5: 
Passage ranking model evaluations.
Passage Ranking ModelAUCcefrAUCwiki
Linear (rank) regression .85 .75 
 w/o characters per word .85 .72 
 w/o words per sentence .84 .75 
 w/o log-likelihood .85 .76 
 w/o Fisher score .79 .84 
Passage Ranking ModelAUCcefrAUCwiki
Linear (rank) regression .85 .75 
 w/o characters per word .85 .72 
 w/o words per sentence .84 .75 
 w/o log-likelihood .85 .76 
 w/o Fisher score .79 .84 
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