THE RATE OF STOP WORDS IN THETOMATICALLY FROM THE YAHOO

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, it

normalize 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