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Table 1 Performance (F-score) of chunkers and their combination when trained for noun-phrase and verb-phrase recognition on different training sets.

From: Training text chunkers on a silver standard corpus: can silver replace gold?

  Training set for noun phrases Training set for verb phrases
System GENIA GSC PennBioIE SSC PennBioIE GSC GENIA GSC PennBioIE SSC PennBioIE GSC
Lingpipe 75.8% 78.5% 78.7% 90.6% 91.6% 91.9%
OpenNLP 80.8% 83.9% 84.7% 90.7% 93.2% 94.8%
Yamcha 80.1% 83.2% 84.0% 89.5% 92.8% 94.2%
Combined 84.3% 84.5% 87.2% 93.7% 93.9% 95.5%
  1. All systems are tested on the PennBioIE corpus.