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

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