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- W2948482421 abstract "Sequential labeling-based NER approaches restrict each word belonging to at most one entity mention, which will face a serious problem when recognizing nested entity mentions. In this paper, we propose to resolve this problem by modeling and leveraging the head-driven phrase structures of entity mentions, i.e., although a mention can nest other mentions, they will not share the same head word. Specifically, we propose Anchor-Region Networks (ARNs), a sequence-to-nuggets architecture for nested mention detection. ARNs first identify anchor words (i.e., possible head words) of all mentions, and then recognize the mention boundaries for each anchor word by exploiting regular phrase structures. Furthermore, we also design Bag Loss, an objective function which can train ARNs in an end-to-end manner without using any anchor word annotation. Experiments show that ARNs achieve the state-of-the-art performance on three standard nested entity mention detection benchmarks." @default.
- W2948482421 created "2019-06-14" @default.
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- W2948482421 date "2019-06-09" @default.
- W2948482421 modified "2023-10-16" @default.
- W2948482421 title "Sequence-to-Nuggets: Nested Entity Mention Detection via Anchor-Region Networks" @default.
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- W2948482421 doi "https://doi.org/10.48550/arxiv.1906.03783" @default.
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