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Certainly TP reduction may increase precision, but furthermore it decreases recall. Due to this
fact, we enriched the selected terms by obtaining new terms, those with similar characteristics
to the initial ones. Specifically, given a text , with selected terms , is a new
term if it cooccurs in with some
, i.e.,

(2) 
Considering the text length, we only selected a window of size 1 around each term of ,
and a minimum frequency of two for each bigram was required as condition to include new terms.
David Pinto
20070508