friendly, nice, okay, great and likes.
the most vital features for predicting the sentiment of this sentence could be the phrase/sentence 'is just okay', 'not great' or 'makes me wonder why everyone likes', which cannot be captured without MR SST-1 SST-2 Subj TREC RAE (Socher et al., 2011b) 77.7 43.2 82.4 --MV-RNN (Socher et al., 2012) 79.0 44.4 82.9 --LSTM (Tai et al., 2015) -46.4 84.9 --RNN (Zhao et al., 2015) 77.2 --93.7 90.2 Constituency Tree-LSTM (Tai et al., 2015) -51.0 88.0 --Dynamic CNN (Kalchbrenner et al., 2014) -48.5 86.8 -93.0 CNN (Kim, 2014) 81   As demonstrated in Section 4.2.1, word-order information plays a vital role for sentiment analysis tasks.