TAILIEUCHUNG - Báo cáo khoa học: "Learning High-Level Planning from Text"

Comprehending action preconditions and effects is an essential step in modeling the dynamics of the world. In this paper, we express the semantics of precondition relations extracted from text in terms of planning operations. The challenge of modeling this connection is to ground language at the level of relations. This type of grounding enables us to create high-level plans based on language abstractions. | Learning High-Level Planning from Text . Branavan Nate Kushman Tao Lei Regina Barzilay Computer Science and Artificial Intelligence Laboratory Massachusetts Institute of Technology branavan nkushman taolei regina @ Abstract Comprehending action preconditions and effects is an essential step in modeling the dynamics of the world. In this paper we express the semantics of precondition relations extracted from text in terms of planning operations. The challenge of modeling this connection is to ground language at the level of relations. This type of grounding enables us to create high-level plans based on language abstractions. Our model jointly learns to predict precondition relations from text and to perform high-level planning guided by those relations. We implement this idea in the reinforcement learning framework using feedback automatically obtained from plan execution attempts. When applied to a complex virtual world and text describing that world our relation extraction technique performs on par with a supervised baseline yielding an F-measure of 66 compared to the baseline s 65 . Additionally we show that a high-level planner utilizing these extracted relations significantly outperforms a strong text unaware baseline - successfully completing 80 of planning tasks as compared to 69 for the 1 Introduction Understanding action preconditions and effects is a basic step in modeling the dynamics of the world. For example having seeds is a precondition for growing wheat. Not surprisingly preconditions have been extensively explored in various sub-fields of AI. However existing work on action models has largely focused on tasks and techniques specific to individual sub-fields with little or no interconnection between them. In NLP precondition relations have been studied in terms of the linguistic mechanisms 1The code data and experimental setup for this work are available at http rbg code planning A pickaxe which is .

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