Based on other work (Fox Tree and Schrock, 1999;Fox Tree and Schrock, 2002;Groen et al., 2010;Walker et al., 2012b), we also present our classifiers with features representing the first lemmatized unigram, bigram, and trigram appearing in each comment.
it would also be reasonable for our system to exploit the QuestionPair and VoterPair constraints described in Section 5.