Fig. 9From: Active learning for ontological event extraction incorporating named entity recognition and unknown word handlingEvaluation of incorporation of the word vector method into active learning with n-grams against GRO’13 dataset. The word vector is applied into the active learning method to solve the out-of-vocabulary (OOV) issue that exists in the unigram model. For the unknown unigram, its score is replaced by the top-25 most similar known unigramsBack to article page