Joint Extraction of Entities and Relations Based on Hierarchical Sequence Labeling
TIAN Jialai, LÜ Xueqiang, YOU Xindong, XIAO Gang, HAN Junmei
Acta Scientiarum Naturalium Universitatis Pekinensis . 2021, (1): 53 -60 .  DOI: 10.13209/j.0479-8023.2020.083

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