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Table 5 Evaluation of gene expression event extraction using different combinations of filters.

From: Simple tricks for improving pattern-based information extraction from the biomedical literature

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