Fusing Context Into Knowledge Graph for Commonsense Question Answering

Yichong Xu, Chenguang Zhu, Ruochen Xu, Yang Liu, Michael Zeng, Xuedong Huang

Keywords: commonsense, question answering, knowledge graph, knowledge, dictionary, definition

TL;DR: We propose to combine knowledge graph and dictionary definitions for commonsense reasoning, and achieves new state-of-art on CommonsenseQA dataset.

Abstract:

Commonsense question answering (QA) requires a model to grasp commonsense and factual knowledge to answer questions about world events. Many prior methods couple language modeling with knowledge graphs (KG). However, although a KG contains rich structural information, it lacks the context to provide a more precise understanding of the concepts. This creates a gap when fusing knowledge graphs into language modeling, especially when there is insufficient labeled data.
Thus, we propose to employ external entity descriptions to provide contextual information for knowledge understanding.
We retrieve descriptions of related concepts from Wiktionary and feed them as additional input to pre-trained language models. The resulting model achieves state-of-the-art result in the CommonsenseQA dataset and the best result among non-generative models in OpenBookQA.
Our code is available at \url{https://github.com/microsoft/DEKCOR-CommonsenseQA}.