To construct the lexicon, we extracted the POS n-grams (as we described in Section 3.1.1 above) from all texts. In comparison,<cite> Mohammad et al. (2013)</cite> used noncontiguous n-grams (unigram-unigram, unigrambigram, and bigram-bigram pairs) . We only used POS n-grams with 2 tokens kept original, and the remaining ones replaced by their POS tag, with n ranging from 3 to 6.