A dynamic programming algorithm for span-based nested named-entity recognition in O(n2) (2023.acl-long)
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| Challenge: | Named entity recognition (NER) is a fundamental problem in information retrieval . nested NER has a cubic-time complexity, but can be realized in quadratic time using a semi-Markov model . |
| Approach: | They propose a span-based named-entity recognition algorithm with a quadratic-time complexity . they add a constraint on the search space to reduce the complexity of the algorithm . |
| Outcome: | The proposed algorithm covers a large part of three standard English benchmarks and delivers comparable results. |
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