Neural Architectures for Named Entity Recognition

State-of-the-art named entity recognition systems rely heavily on hand-crafted features and domain-specific knowledge in order to learn effectively from the small, supervised training corpora that are available. In this paper, we introduce two new neural architectures---one based on bidirectional LSTMs and conditional random fields, and the other that constructs and labels segments using a transition-based approach inspired by shift-reduce parsers. Our models rely on two sources of information about words: character-based word representations learned from the supervised corpus and unsupervised word representations learned from unannotated corpora. Our models obtain state-of-the-art performance in NER in four languages without resorting to any language-specific knowledge or resources such as gazetteers.

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Task Dataset Model Metric Name Metric Value Global Rank Result Benchmark
Named Entity Recognition CoNLL++ LSTM-CRF F1 91.47 # 8
Named Entity Recognition CoNLL 2003 (English) LSTM-CRF F1 90.94 # 63

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