Suxiang Zhang Juan Wen Xiaojie Wang Lei Li Automatic Entity Relation Extraction Based on Maximum Entropy. 540-544 2006 conf/isda/2006 ISDA (1) http://doi.ieeecomputersociety.org/10.1109/ISDA.2006.115 db/conf/isda/isda2006-1.html#ZhangWWL06