Feature functions description.
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资源简介：
The feature functions are used by all skip-mention CRF models and are modeled as unigram or bigram features. The exact details (e.g., which mention values are used by a specific feature functions) and implementations can be retrieved from our public source repository [31] (within the class FeatureFunctionPackages). The abbreviations A, S and C define which feature functions were used when training the models for the ACE2004, SemEval2010 and CoNLL2012 datasets, respectively.
创建时间：
2014-06-23
