Apoorv Agarwal Fadi Biadsy Kathleen McKeown Contextual Phrase-Level Polarity Analysis Using Lexical Affect Scoring and Syntactic N-Grams. 24-32 2009 EACL http://www.aclweb.org/anthology/E09-1004 conf/eacl/2009 db/conf/eacl/eacl2009.html#AgarwalBM09