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- W4285306609 abstract "Named entity recognition (NER) is a fundamental task to recognize specific types of entities from a given sentence. Depending on how the entities appear in the sentence, it can be divided into three subtasks, namely, Flat NER, Nested NER, and Discontinuous NER. Among the existing approaches, only the generative model can be uniformly adapted to these three subtasks. However, when the generative model is applied to NER, its optimization objective is not consistent with the task, which makes the model vulnerable to the incorrect biases. In this paper, we analyze the incorrect biases in the generation process from a causality perspective and attribute them to two confounders: pre-context confounder and entity-order confounder. Furthermore, we design Intra- and Inter-entity Deconfounding Data Augmentation methods to eliminate the above confounders according to the theory of backdoor adjustment. Experiments show that our method can improve the performance of the generative NER model in various datasets." @default.
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- W4285306609 date "2022-01-01" @default.
- W4285306609 modified "2023-10-04" @default.
- W4285306609 title "De-Bias for Generative Extraction in Unified NER Task" @default.
- W4285306609 doi "https://doi.org/10.18653/v1/2022.acl-long.59" @default.
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