A Simple but Effective Pluggable Entity Lookup Table for Pre-trained Language Models

• URL: http://arxiv.org/abs/2202.13392v1
• Date: Sun, 27 Feb 2022 16:30:22 GMT
• Title: A Simple but Effective Pluggable Entity Lookup Table for Pre-trained Language Models
• Authors: Deming Ye, Yankai Lin, Peng Li, Maosong Sun, Zhiyuan Liu
• Abstract summary: We propose to build a simple but effective Pluggable Entity Lookup Table (PELT) on demand. PELT can be compatibly plugged as inputs to infuse entity supplemental knowledge into pre-trained language models. Experiments on knowledge-related tasks demonstrate that our method, PELT, can flexibly and effectively transfer entity knowledge from related corpora into PLMs.
• Score: 93.39977756450354
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Pre-trained language models (PLMs) cannot well recall rich factual knowledge of entities exhibited in large-scale corpora, especially those rare entities. In this paper, we propose to build a simple but effective Pluggable Entity Lookup Table (PELT) on demand by aggregating the entity's output representations of multiple occurrences in the corpora. PELT can be compatibly plugged as inputs to infuse supplemental entity knowledge into PLMs. Compared to previous knowledge-enhanced PLMs, PELT only requires 0.2%-5% pre-computation with capability of acquiring knowledge from out-of-domain corpora for domain adaptation scenario. The experiments on knowledge-related tasks demonstrate that our method, PELT, can flexibly and effectively transfer entity knowledge from related corpora into PLMs with different architectures.

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