Table 4

Contributions of various features in our best closed system (closed-3): decrease in precision/recall/F-measure by leaving one feature at a time.

Feature
P
R
F

Orthographic Feature
27.1
42.5
33.2
POS
23.7
31.1
26.8
Surface Word
12.2
8.1
10.1
Trigger Word
2.4
1.6
1.9
Morphological Pattern
1.3
1.0
1.1

Zhou et al. BMC Bioinformatics 2005 6(Suppl 1):S7   doi:10.1186/1471-2105-6-S1-S7