Answering Questions Using Advanced Semantics and Probabilistic Inference

In this paper we argue that access to rich se- mantic structures derived from questions and answers will enable both the retrieval of more accurate answers to simple questions and en- able inference processes that explain the va- lidity and contextual coverage of answers to complex questions. Processing complex ques- tions involves the identifications of several forms of complex semantic structures. Answer Extraction is performed by recognizing event inter-relationships and by inferring over mul- tiple sentences and texts, using background knowledge.