Tianyong Hao Wanpeng Song Dawei Hu Wenyin Liu Automatic Generation of Semantic Patterns for User-Interactive Question Answering. 632-637 2008 AIRS http://dx.doi.org/10.1007/978-3-540-68636-1_75 conf/airs/2008 db/conf/airs/airs2008.html#HaoSHL08