arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.09036cs.CL
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作为知识基础的语言模型:实体表示、存储容量和释义的语义

Language Models as Knowledge Bases: On Entity Representations, Storage Capacity, and Paraphrased Queries

RIKEN AIP(日本理化学研究所革新智能统合研究中心);Tohoku University(东北大学)

Benjamin Heinzerling, Kentaro Inui

摘要:

预训练的语言模型已被建议作为结构化知识库的可能替代或补充。然而,到目前为止,这种新兴的LM作为KB的范例只在非常有限的设置中被考虑过,它只允许处理21k个实体,这些实体的单个令牌名称在常见的LM词汇表中找到。此外,这种范例的主要好处,即使用各种自然语言释义查询知识库,是目前为止探索不足。在这里,我们制定了两个基本的要求,处理LM知识库:(i)存储大量的事实,涉及大量的实体和(ii)查询存储的事实的能力。我们探讨了三个实体表示,使LM代表数以百万计的实体,并提出了一个详细的案例研究解释查询世界知识的LM,从而提供了一个概念证明,语言模型确实可以作为知识库。

英文摘要:

Pretrained language models have been suggested as a possible alternative or complement to structured knowledge bases. However, this emerging LM-as-KB paradigm has so far only been considered in a very limited setting, which only allows handling 21k entities whose single-token name is found in common LM vocabularies. Furthermore, the main benefit of this paradigm, namely querying the KB using a variety of natural language paraphrases, is underexplored so far. Here, we formulate two basic requirements for treating LMs as KBs: (i) the ability to store a large number facts involving a large number of entities and (ii) the ability to query stored facts. We explore three entity representations that allow LMs to represent millions of entities and present a detailed case study on paraphrased querying of world knowledge in LMs, thereby providing a proof-of-concept that language models can indeed serve as knowledge bases.

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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