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Graph Pre-training for AMR Parsing and Generation

2022-03-15 12:47:00
Xuefeng Bai, Yulong Chen, Yue Zhang
arXiv_CL
           
Abstract

Abstract meaning representation (AMR) highlights the core semantic information of text in a graph structure. Recently, pre-trained language models (PLMs) have advanced tasks of AMR parsing and AMR-to-text generation, respectively. However, PLMs are typically pre-trained on textual data, thus are sub-optimal for modeling structural knowledge. To this end, we investigate graph self-supervised training to improve the structure awareness of PLMs over AMR graphs. In particular, we introduce two graph auto-encoding strategies for graph-to-graph pre-training and four tasks to integrate text and graph information during pre-training. We further design a unified framework to bridge the gap between pre-training and fine-tuning tasks. Experiments on both AMR parsing and AMR-to-text generation show the superiority of our model. To our knowledge, we are the first to consider pre-training on semantic graphs.

Abstract (translated)

URL

https://arxiv.org/abs/2203.07836

PDF

https://arxiv.org/pdf/2203.07836.pdf

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