Semantic extensions of the Ephyra QA system for TREC 2007 (2007)

by N SCHLAEFER, J KO, J BETTERIDGE, G SAUTTER, AMD E NYBERG, M P
Venue:In Proceedings of the 16th Text REtrieval Conference (TREC’07). NIST Special Publication 500-274. National Institute of Standards and Technology (NIST