Diversifying Content Generation for Commonsense Reasoning with Mixture of Knowledge Graph Experts

Wenhao Yu, Chenguang Zhu, Lianhui Qin, Zhihan Zhang, Tong Zhao, Meng Jiang


Abstract
Generative commonsense reasoning (GCR) in natural language is to reason about the commonsense while generating coherent text. Recent years have seen a surge of interest in improving the generation quality of commonsense reasoning tasks. Nevertheless, these approaches have seldom investigated diversity in the GCR tasks, which aims to generate alternative explanations for a real-world situation or predict all possible outcomes. Diversifying GCR is challenging as it expects to generate multiple outputs that are not only semantically different but also grounded in commonsense knowledge. In this paper, we propose MoKGE, a novel method that diversifies the generative reasoning by a mixture of expert (MoE) strategy on commonsense knowledge graphs (KG). A set of knowledge experts seek diverse reasoning on KG to encourage various generation outputs. Empirical experiments demonstrated that MoKGE can significantly improve the diversity while achieving on par performance on accuracy on two GCR benchmarks, based on both automatic and human evaluations.
Anthology ID:
2022.dlg4nlp-1.1
Volume:
Proceedings of the 2nd Workshop on Deep Learning on Graphs for Natural Language Processing (DLG4NLP 2022)
Month:
July
Year:
2022
Address:
Seattle, Washington
Venue:
DLG4NLP
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
1–11
Language:
URL:
https://aclanthology.org/2022.dlg4nlp-1.1
DOI:
10.18653/v1/2022.dlg4nlp-1.1
Bibkey:
Cite (ACL):
Wenhao Yu, Chenguang Zhu, Lianhui Qin, Zhihan Zhang, Tong Zhao, and Meng Jiang. 2022. Diversifying Content Generation for Commonsense Reasoning with Mixture of Knowledge Graph Experts. In Proceedings of the 2nd Workshop on Deep Learning on Graphs for Natural Language Processing (DLG4NLP 2022), pages 1–11, Seattle, Washington. Association for Computational Linguistics.
Cite (Informal):
Diversifying Content Generation for Commonsense Reasoning with Mixture of Knowledge Graph Experts (Yu et al., DLG4NLP 2022)
Copy Citation:
PDF:
https://aclanthology.org/2022.dlg4nlp-1.1.pdf
Code
 DM2-ND/MoKGE