Question Answering Passage Retrieval Using Dependency Parsing

August 17, 2005

20/28

Comparison Systems

•MITRE –baseline

–Stemmed word overlapping

–Baseline in previous work on passage retrieval evaluation

•SiteQ – top performing density based method

–using 3 sentence window

•NUS

–Similar to SiteQ, but using sentences as passages

•Strict Matching of Relations

–Simulate strict matching in previous work for answer selection

–Counting the number of exactly matched paths

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•Relation matching are applied on top of MITRE and NUS