Hang Cui et al.
NUS at TREC-13 QA Main Task
15/20
Question Typing and Passage Retrieval for Factoid/List Q’s
•Question
typing
–Leveraging our past question typology and
rule-based question
typing module.
–Offline tagging of the whole TREC corpus using our
rule-based named
entity tagger.
•Passage
retrieval – on two sources:
–Topic-relevant document set by the document retrieval module: NUSCHUA1 and 2.
–Definition sentences for a specific topic by the definition generation module: NUSCHUA3
•Question-specific wrappers on definitions.