Dai Quoc Nguyen Dat Quoc Nguyen Son Bao Pham A Semantic Approach for Question Analysis. 156-165 2012 IEA/AIE https://doi.org/10.1007/978-3-642-31087-4_17 https://www.wikidata.org/entity/Q57262167 conf/ieaaie/2012 db/conf/ieaaie/ieaaie2012.html#NguyenNP12