BnO at the NTCIR-11 English Fact Validation Task

This paper describes the submission of BnO team to the RITE-VAL Fact Validation task [11] for English in NTCIR11. In this submission, the BnO team formulated the fact validation as a textual entailment task, where the objective is to find a piece of text from a corpus such that it entails the stated fact. For that purpose, BnO team made use of search results retrieved by the search engine TSUBAKI as text T side of textual entailment pairs. Then, we used a logical algebraic inference system developed in [18] to test whether or not an entailment relation exists between the sentences retrieved by TSUBAKI and the hypotheses. We also tested a classifier based on Random Forests that used the output from the inference engine and other features related to TSUBAKI search results.