Combining Specialized Entailment Engines for RTE-4.
Elena Cabrio, Milen Kouylekov, Bernardo Magnini · 2008
The main goal of FBK-irst participation at RTE-4 was to experiment the use of combined specialized entailment engines, each addressing a specific phenomena relevant to entailment. The approach is motivated since textual entailment is due to the combination of several linguistic phenomena which interact among them in a quite complex way. We were driven by the following two considerations: (i) devise a general framework, based on distance between T and H, flexible enough to allow the combination of single entailment engines; (ii) provide a modular approach through which evaluate progresses on single aspects of entailment, using specialised traning and test dataset. For RTE-4 we used two simple entailment engines, one addressing negation and the other lexical similarity, with a linear combination of their respective distances on T-H pairs. 1