NUS at TREC 13 QA Main Task

Hang Cui et al.

NUS at TREC-13 QA Main Task

9/20

Using Mutual Information to Measure Relation Co-occurrence

•Two relations’ similarity measured by their co-occurrences in the question and answer paths.

•Variation of mutual information (MI)

–

–a to discount the score of two relations appearing in long paths.

Relation-1 Relation-2 Similarity

whn pcomp-n 0.43

whn i 0.42

i pcomp-n 0.39

i s 0.37

pred mod 0.37

appo vrel 0.35

whn nn 0.34

s num 0.33