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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.

From: Recognition of protein/gene names from text using an ensemble of classifiers

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