Kiduk Yang Ning Yu Hui Zhang WIDIT in TREC 2007 Blog Track: Combining Lexicon-Based Methods to Detect Opinionated Blogs. 2007 TREC http://trec.nist.gov/pubs/trec16/papers/indianau.blog.final.pdf conf/trec/2007 db/conf/trec/trec2007.html#YangYZ07