... the word “are”. Among these extracted opinion words for the feature noun, if some belong to the positive opinion lexicon and some belong to the negative opinion lexicon, we conclude the noun ... real-life datasets of reviews. Table 1 shows the domains (based on their names) of the datasets, the number of sentences, and the number of noun features. The first two datasets were obtained from ... (1997) did the first work to tackle the problem for adjectives using a corpus. The approach exploits some conjunctive patterns, involving and, or, but, either-or, or neither-nor, with the intuition...