Table 2: Single label, sentence level results.

Classifier Feature set Precision

Bag-of-words 62.39%
Bag-of-words + gene name boosting 50.00%
NBC Bag-of-words + trigger word boosting 49.92%
Bag-of-words + trigger word boosting + 49.77%
Gene name boosting
Bag-of-POS tagged words 43.30%