Hang Cui et al.
NUS at TREC-13 QA Main Task
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Exploiting Definition Sentences to Answer Factoid/List Questions
Conduct passage retrieval for factoid/list questions on the definition sentences about
the topic.
Much more efficient due to smaller search
space.
Average accuracy of
0.50, lower than that over all topic-related documents.
Due to low recall imposed cut-off for selecting definition sentences (naοve
use of definitions).
Some sentences for answering
factoid/list questions are not definition sentences.