Nested Named Entity Recognition via Second-best Sequence Learning and Decoding

5 Sep 2019Takashi ShibuyaEduard Hovy

When an entity name contains other names within it, the identification of all combinations of names can become difficult and expensive. We propose a new method to recognize not only outermost named entities but also inner nested ones... (read more)

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Evaluation results from the paper


Task Dataset Model Metric name Metric value Global rank Compare
Nested Mention Recognition ACE 2004 Second-best learning and decoding F1 82.81 # 2
Nested Named Entity Recognition ACE 2004 Second-best learning and decoding F1 82.81 # 2
Named Entity Recognition ACE 2004 Second-best learning and decoding F1 82.81 # 2
Named Entity Recognition ACE 2005 Second-best learning and decoding F1 82.70 # 2
Nested Mention Recognition ACE 2005 Second-best learning and decoding F1 82.70 # 2
Nested Named Entity Recognition GENIA Second-best learning and decoding F1 77.25 # 2
Named Entity Recognition GENIA Second-best learning and decoding F1 77.25 # 2