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LERT: A Linguistically-motivated Pre-trained Language Model

2022-11-10 05:09:16
Yiming Cui, Wanxiang Che, Shijin Wang, Ting Liu

Abstract

Pre-trained Language Model (PLM) has become a representative foundation model in the natural language processing field. Most PLMs are trained with linguistic-agnostic pre-training tasks on the surface form of the text, such as the masked language model (MLM). To further empower the PLMs with richer linguistic features, in this paper, we aim to propose a simple but effective way to learn linguistic features for pre-trained language models. We propose LERT, a pre-trained language model that is trained on three types of linguistic features along with the original MLM pre-training task, using a linguistically-informed pre-training (LIP) strategy. We carried out extensive experiments on ten Chinese NLU tasks, and the experimental results show that LERT could bring significant improvements over various comparable baselines. Furthermore, we also conduct analytical experiments in various linguistic aspects, and the results prove that the design of LERT is valid and effective. Resources are available at this https URL

Abstract (translated)

URL

https://arxiv.org/abs/2211.05344

PDF

https://arxiv.org/pdf/2211.05344.pdf


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