Table 3.

Table 3 Recognition Performance over the Test Corpus of the BioCreAtIvE II GM Corpus, N = 6,331

System	Notes	Precision	Recall	F-Measure
Ando	With unlabeled data	0.8848	0.8597	0.8721
BANNER	model version 2	0.8741	0.8277	0.8502
ABNER	With post-processing	0.8590	0.7999	0.8284
LingPipe	36-gram with post-processing	0.7898	0.8735	0.8295
MEMM	2nd-order with post-processing	0.8526	0.8379	0.8452
CRF	The best configuration	0.8938	0.8496	0.8712
BioTagger-GM	Combination of four systems	0.8821	0.8952	0.8887

GM = gene mention; CRF = conditional random field.