Question Answering with LCC's CHAUCER-2 at TREC 2007
Andrew Hickl, Kirk Roberts, Bryan Rink, Jeremy Bensley, Tobias Jungen, Shi Ying, John Williams · 2006
CHAUCER is a Q/A system developed for (a) combining several strategies for modeling the target of a series of questions and (b) optimizing the extraction of answers. Targets were modeled by (1) topic signatures; (2) semantic types; (3) lexico-semantic patterns; (4) frame dependencies; and (5) predictive questions. Several strategies for answer extraction were also tried. The best-performing strategy was based on the use of textual entailment. 1.