Table 5.

Evaluation of gene expression event extraction using different combinations of filters.

Filter	Precision	Recall	F1
No filter	24.7	49.2	32.9
Trigger Word	39.7	48.0	43.5
Pattern Length (exactly 4 token)	51.0	29.8	37.6
Pattern lengths (≤ 4 token)	56.2	43.5	49.0
Pattern Performance (top 50 pattern)	50.0	48.3	49.0
Trigger Word + Pattern Length	65.6	39.3	49.2
Trigger Word + Pattern Performance	77.4	46.3	58.0