论文标题
通过语言和图表网络增强了事实验证
Program Enhanced Fact Verification with Verbalization and Graph Attention Network
论文作者
论文摘要
基于结构化数据进行事实验证对于许多现实生活中的应用非常重要,并且是一个具有挑战性的研究问题,尤其是当它涉及符号操作和基于语言理解的非正式推论时。在本文中,我们提出了一个程序增强的言语和图形注意网络(ProgvGat),以将程序和执行集成到文本推理模型中。具体而言,提出了一个具有程序执行模型的语言化,以累积嵌入在表格上的操作中的证据。基于此,我们构建了图形注意力验证网络,该网络旨在融合不同的证据来源,从言语程序执行,程序结构以及原始语句和表格融合,以做出最终的验证决定。为了支持上述框架,我们提出了一个基于保证金损失的新培训策略进行优化的程序选择模块,以产生更准确的程序,该计划可有效增强最终验证结果。实验结果表明,所提出的框架在基准数据集TABFACT上实现了新的最新性能,即74.4%的精度。
Performing fact verification based on structured data is important for many real-life applications and is a challenging research problem, particularly when it involves both symbolic operations and informal inference based on language understanding. In this paper, we present a Program-enhanced Verbalization and Graph Attention Network (ProgVGAT) to integrate programs and execution into textual inference models. Specifically, a verbalization with program execution model is proposed to accumulate evidences that are embedded in operations over the tables. Built on that, we construct the graph attention verification networks, which are designed to fuse different sources of evidences from verbalized program execution, program structures, and the original statements and tables, to make the final verification decision. To support the above framework, we propose a program selection module optimized with a new training strategy based on margin loss, to produce more accurate programs, which is shown to be effective in enhancing the final verification results. Experimental results show that the proposed framework achieves the new state-of-the-art performance, a 74.4% accuracy, on the benchmark dataset TABFACT.