4. Stopwords Rate: The rate of stop words in the
tomatically from the Yahoo! Answers website. We
sentence. If a sentence contains too many stop words, itnormalize all these feature values to real numbers
is more likely a spam or chitchat sentence rather than aninformative one.between 0 and 1 by dividing them by the corre-
sponding maximal value of these features. These
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