Fire Burns, Sword Cuts: Commonsense Inductive Bias for Exploration in Text-based Games

Dongwon Ryu, Ehsan Shareghi, Meng Fang, Yunqiu Xu, Shirui Pan, Reza Haf


Abstract
Text-based games (TGs) are exciting testbeds for developing deep reinforcement learning techniques due to their partially observed environments and large action spaces. In these games, the agent learns to explore the environment via natural language interactions with the game simulator. A fundamental challenge in TGs is the efficient exploration of the large action space when the agent has not yet acquired enough knowledge about the environment. We propose CommExpl, an exploration technique that injects external commonsense knowledge, via a pretrained language model (LM), into the agent during training when the agent is the most uncertain about its next action. Our method exhibits improvement on the collected game scores during the training in four out of nine games from Jericho. Additionally, the produced trajectory of actions exhibit lower perplexity, when tested with a pretrained LM, indicating better closeness to human language.
Anthology ID:
2022.acl-short.56
Volume:
Proceedings of the 60th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers)
Month:
May
Year:
2022
Address:
Dublin, Ireland
Venue:
ACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
515–522
Language:
URL:
https://aclanthology.org/2022.acl-short.56
DOI:
10.18653/v1/2022.acl-short.56
Bibkey:
Cite (ACL):
Dongwon Ryu, Ehsan Shareghi, Meng Fang, Yunqiu Xu, Shirui Pan, and Reza Haf. 2022. Fire Burns, Sword Cuts: Commonsense Inductive Bias for Exploration in Text-based Games. In Proceedings of the 60th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers), pages 515–522, Dublin, Ireland. Association for Computational Linguistics.
Cite (Informal):
Fire Burns, Sword Cuts: Commonsense Inductive Bias for Exploration in Text-based Games (Ryu et al., ACL 2022)
Copy Citation:
PDF:
https://aclanthology.org/2022.acl-short.56.pdf
Code
 ktr0921/comm-expl-kg-a2c
Data
Jericho