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arXiv 2103.06752cs.AIcs.CL
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基于图模式同构的知识图谱问答生成

Knowledge Graph Question Answering using Graph-Pattern Isomorphism

Paderborn University(帕德博恩大学);Fraunhofer IAIS(弗劳恩霍夫智能分析与信息系统研究所);Universität Hamburg(汉堡大学);Globo(环球集团)

Daniel Vollmers, Rricha Jalota, Diego Moussallem, Hardik Topiwala, Axel-Cyrille Ngonga Ngomo, Ricardo Usbeck

摘要:

知识图谱问答(KGQA)系统基于机器学习算法,需要数千个问答对作为训练样本或需要模块微调的自然语言处理管道。在本文中,我们提出了一种新的QA方法,称为TeBaQA。我们的方法学习回答问题的基础上,从SPARQL查询的基本图形模式的图同构。学习基本图形模式是有效的,因为可能的模式数量很少。这种新颖的范例减少了实现最先进性能所需的训练数据量。TeBaQA还通过将QA系统开发任务转换为更小且更容易的数据编译任务来加快域适应过程。在我们的评估中,TeBaQA在QALD-8上实现了最先进的性能,并在QALD-9和LC-QuAD v1上提供了相当的结果。此外,我们对处理聚合和最高级问题的复杂查询以及消融研究进行了细粒度评估,突出了未来的研究挑战。

英文摘要:

Knowledge Graph Question Answering (KGQA) systems are based on machine learning algorithms, requiring thousands of question-answer pairs as training examples or natural language processing pipelines that need module fine-tuning. In this paper, we present a novel QA approach, dubbed TeBaQA. Our approach learns to answer questions based on graph isomorphisms from basic graph patterns of SPARQL queries. Learning basic graph patterns is efficient due to the small number of possible patterns. This novel paradigm reduces the amount of training data necessary to achieve state-of-the-art performance. TeBaQA also speeds up the domain adaption process by transforming the QA system development task into a much smaller and easier data compilation task. In our evaluation, TeBaQA achieves state-of-the-art performance on QALD-8 and delivers comparable results on QALD-9 and LC-QuAD v1. Additionally, we performed a fine-grained evaluation on complex queries that deal with aggregation and superlative questions as well as an ablation study, highlighting future research challenges.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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