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Knowledge-Aware Procedural Text Understanding with Multi-Stage Training

2020-09-28 10:28:40
Zhihan Zhang, Xiubo Geng, Tao Qin, Yunfang Wu, Daxin Jiang

Abstract

We focus on the task of procedural text understanding, which aims to track entities' states and locations during a natural process. Although recent approaches have achieved substantial progress, they are far behind human performance. Two challenges, difficulty of commonsense reasoning and data insufficiency, still remain unsolved. In this paper, we propose a novel KnOwledge-Aware proceduraL text understAnding (KOALA) model, which leverages external knowledge sources to solve these issues. Specifically, we retrieve informative knowledge triples from ConceptNet and perform knowledge-aware reasoning while tracking the entities. Besides, we employ a multi-stage training schema which fine-tunes the BERT model over unlabeled data collected from Wikipedia before further fine-tuning it on the final model. Experimental results on two procedural text datasets, ProPara and Recipes, verify the effectiveness of the proposed methods, in which our model achieves state-of-the-art performance in comparison to various baselines.

Abstract (translated)

URL

https://arxiv.org/abs/2009.13199

PDF

https://arxiv.org/pdf/2009.13199.pdf


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