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• W2992766064 abstract "To tackle Named Entity Recognition (NER) tasks, supervised methods need to obtain sufficient cleanly annotated data, which is labor and time consuming. On the contrary, distantly supervised methods acquire automatically annotated data using dictionaries to alleviate this requirement. Unfortunately, dictionaries hinder the effectiveness of distantly supervised methods for NER due to its limited coverage, especially in specific domains. In this paper, we aim at the limitations of the dictionary usage and mention boundary detection. We generalize the distant supervision by extending the dictionary with headword based non-exact matching. We apply a function to better weight the matched entity mentions. We propose a span-level model, which classifies all the possible spans then infers the selected spans with a proposed dynamic programming algorithm. Experiments on all three benchmark datasets demonstrate that our method outperforms previous state-of-the-art distantly supervised methods." @default.
• W2992766064 created "2019-12-13" @default.
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• W2992766064 date "2019-12-03" @default.
• W2992766064 modified "2023-09-28" @default.
• W2992766064 title "HAMNER: Headword Amplified Multi-span Distantly Supervised Method for Domain Specific Named Entity Recognition" @default.
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• W2992766064 doi "https://doi.org/10.48550/arxiv.1912.01731" @default.
• W2992766064 hasPublicationYear "2019" @default.
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