Miguel E. Ruiz Ying Sun Jianqiang Wang Hongfang Liu Exploring Traits of Adjectives to Predict Polarity Opinion in Blogs and Semantic Filters in Genomics. 2007 TREC http://trec.nist.gov/pubs/trec16/papers/unorth-texas.blog.final.pdf conf/trec/2007 db/conf/trec/trec2007.html#RuizSWL07