Towards Effective Multi-Task Interaction for Entity-Relation Extraction: A Unified Framework with Selection Recurrent Network

• URL: http://arxiv.org/abs/2202.07281v1
• Date: Tue, 15 Feb 2022 09:54:33 GMT
• Title: Towards Effective Multi-Task Interaction for Entity-Relation Extraction: A Unified Framework with Selection Recurrent Network
• Authors: An Wang, Ao Liu, Hieu Hanh Le and Haruo Yokota
• Abstract summary: Entity-relation extraction aims to jointly solve named entity recognition (NER) and relation extraction (RE) Recent approaches use either one-way sequential information propagation in a pipeline manner or two-way implicit interaction with a shared encoder. We propose a novel and unified cascade framework that combines the advantages of both sequential information propagation and implicit interaction.
• Score: 4.477310325275069
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Entity-relation extraction aims to jointly solve named entity recognition (NER) and relation extraction (RE). Recent approaches use either one-way sequential information propagation in a pipeline manner or two-way implicit interaction with a shared encoder. However, they still suffer from poor information interaction due to the gap between the different task forms of NER and RE, raising a controversial question whether RE is really beneficial to NER. Motivated by this, we propose a novel and unified cascade framework that combines the advantages of both sequential information propagation and implicit interaction. Meanwhile, it eliminates the gap between the two tasks by reformulating entity-relation extraction as unified span-extraction tasks. Specifically, we propose a selection recurrent network as a shared encoder to encode task-specific independent and shared representations and design two sequential information propagation strategies to realize the sequential information flow between NER and RE. Extensive experiments demonstrate that our approaches can achieve state-of-the-art results on two common benchmarks, ACE05 and SciERC, and effectively model the multi-task interaction, which realizes significant mutual benefits of NER and RE.

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