Knowledge Graph Based Synthetic Corpus Generation for Knowledge-Enhanced Language Model Pre-training
Authors: Oshin Agarwal, Heming Ge, Siamak Shakeri, Rami Al-Rfou
AI-generated Key Points
- The paper discusses converting knowledge graph (KG) triples into natural text, specifically focusing on verbalizing the entire English Wikidata KG.
- The authors highlight the unique challenges of verbalizing a broad, open-domain, large-scale KG like Wikidata.
- The proposed approach converts the KG into natural text to enable seamless integration into existing language models.
- Converting KGs into natural text offers advantages such as improved factual accuracy and reduced toxicity in language models.
- Evaluation of the approach shows significant improvements in knowledge-intensive tasks like open domain question answering (QA) and the LAMA knowledge probe.
- Prior work in Data-To-Text Generation focused on domain-specific benchmark datasets, while this study tackles verbalizing an encyclopedic KG like Wikidata.
- The research contributes to bridging the gap between structured KGs and natural language corpora.
- The paper presents a novel approach to generating synthetic corpora by converting KG triples from English Wikidata into natural text.
- Results demonstrate the effectiveness of this approach in enhancing language models' performance while ensuring improved factual accuracy and reduced toxicity.
Abstract: Prior work on Data-To-Text Generation, the task of converting knowledge graph (KG) triples into natural text, focused on domain-specific benchmark datasets. In this paper, however, we verbalize the entire English Wikidata KG, and discuss the unique challenges associated with a broad, open-domain, large-scale verbalization. We further show that verbalizing a comprehensive, encyclopedic KG like Wikidata can be used to integrate structured KGs and natural language corpora. In contrast to the many architectures that have been developed to integrate these two sources, our approach converts the KG into natural text, allowing it to be seamlessly integrated into existing language models. It carries the further advantages of improved factual accuracy and reduced toxicity in the resulting language model. We evaluate this approach by augmenting the retrieval corpus in a retrieval language model and showing significant improvements on the knowledge intensive tasks of open domain QA and the LAMA knowledge probe.
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