Yunyao Li Rajasekar Krishnamurthy Sriram Raghavan Shivakumar Vaithyanathan H. V. Jagadish Regular Expression Learning for Information Extraction. 21-30 2008 EMNLP http://www.aclweb.org/anthology/D08-1003 conf/emnlp/2008 db/conf/emnlp/emnlp2008.html#LiKRVJ08