Knowledge Base Completion for Long-Tail Entities

Lihu Chen; Simon Razniewski; Gerhard Weikum

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arXiv · 2306.17472

Knowledge Base Completion for Long-Tail Entities

Lihu Chen·Simon Razniewski·Gerhard Weikum

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Abstract

Despite their impressive scale, knowledge bases (KBs), such as Wikidata, still contain significant gaps. Language models (LMs) have been proposed as a source for filling these gaps. However, prior works have focused on prominent entities with rich coverage by LMs, neglecting the crucial case of long-tail entities. In this paper, we present a novel method for LM-based-KB completion that is specifically geared for facts about long-tail entities. The method leverages two different LMs in two stages: for candidate retrieval and for candidate verification and disambiguation. To evaluate our method and various baselines, we introduce a novel dataset, called MALT, rooted in Wikidata. Our method outperforms all baselines in F1, with major gains especially in recall.

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BibTeX RIS

Lihu Chen, Simon Razniewski, Gerhard Weikum. 2023-06-30. Knowledge Base Completion for Long-Tail Entities. https://arxiv.org/abs/2306.17472

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