Second, a number of methods for subjectivity or sentiment analysis start with a set of seed words and then search through WordNet to find other subjective words (Kamps and Marx, 2002;Yu and Hatzivassiloglou, 2003;Hu and Liu, 2004;Kim and Hovy, 2004;Esuli and Sebastiani, 2005).
interestingly, this aspect can drastically affect the algorithm accuracy.