It's a Contradiction - no, it's not: A Case Study using Functional Relations.

Alan Ritter Stephen Soderland Doug Downey Oren Etzioni It's a Contradiction - no, it's not: A Case Study using Functional Relations. 11-20 2008 EMNLP http://www.aclweb.org/anthology/D08-1002 conf/emnlp/2008 db/conf/emnlp/emnlp2008.html#RitterSDE08