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Monolingual alignment models have been shown to boost the performance of question answering systems by "bridging the lexical chasm" between questions and answers. The main limitation of these approaches is that they require semistructured training data in the form of question-answer pairs, which is difficult to obtain in specialized domains or lowresource languages. We propose two inexpensive methods for training alignment models solely using free text, by generating artificial question-answerdoi:10.3115/v1/n15-1025 dblp:conf/naacl/SharpJSC15 fatcat:5nzfu7godfdg3mf6mojkdbp2ua