Michael J. Cafarella Doug Downey Stephen Soderland Oren Etzioni KnowItNow: Fast, Scalable Information Extraction from the Web. 2005 conf/naacl/2005 HLT/EMNLP http://acl.ldc.upenn.edu/H/H05/H05-1071.pdf db/conf/naacl/naacl2005.html#CafarellaDSE05