Rodrigo de Salvo Braz Roxana Girju Vasin Punyakanok Dan Roth Mark Sammons An Inference Model for Semantic Entailment in Natural Language. 1678-1679 2005 conf/ijcai/2005 IJCAI http://www.ijcai.org/papers/post-0529.pdf db/conf/ijcai/ijcai2005.html#BrazGPRS05