Take a Break in the Middle: Investigating Subgoals towards Hierarchical Script Generation
Xinze Li, Yixin Cao, Muhao Chen, Aixin Sun · 2023
Goal-oriented Script Generation is a new task of generating a list of steps that can fulfill the given goal.In this paper, we propose to extend the task from the perspective of cognitive theory.Instead of a simple flat structure, the steps are typically organized hierarchically -Human often decompose a complex task into subgoals, where each subgoal can be further decomposed into steps.To establish the benchmark, we contribute a new dataset, propose several baseline methods, and set up evaluation metrics.Both automatic and human evaluation verify the high-quality of dataset, as well as the effectiveness of incorporating subgoals into hierarchical script generation.Furthermore, We also design and evaluate the model to discover subgoal, and find that it is a bit more difficult to decompose the goals than summarizing from segmented steps.