tailieunhanh - Báo cáo khoa học: "Event Extraction in a Plot Advice Agent"

In this paper we present how the automatic extraction of events from text can be used to both classify narrative texts according to plot quality and produce advice in an interactive learning environment intended to help students with story writing. We focus on the story rewriting task, in which an exemplar story is read to the students and the students rewrite the story in their own words. | Event Extraction in a Plot Advice Agent Harry Halpin School of Informatics University of Edinburgh 2 Buccleuch Place Edinburgh EH8 9LW Scotland UK Johanna D. Moore School of Informatics University of Edinburgh 2 Buccleuch Place Edinburgh EH8 9LW Scotland UK Abstract In this paper we present how the automatic extraction of events from text can be used to both classify narrative texts according to plot quality and produce advice in an interactive learning environment intended to help students with story writing. We focus on the story rewriting task in which an exemplar story is read to the students and the students rewrite the story in their own words. The system automatically extracts events from the raw text formalized as a sequence of temporally ordered predicate-arguments. These events are given to a machine-learner that produces a coarse-grained rating of the story. The results of the machine-learner and the extracted events are then used to generate fine-grained advice for the students. 1 Introduction In this paper we investigate how features of a text discovered via automatic event extraction can be used in both natural language understanding and advice generation in the domain of narrative instruction. The background application is a fully automated plot analysis agent to improve the writing of students could be used by current narrative tutoring systems Robertson and Wiemer-Hastings 2002 . As shown by participatory design studies teachers are interested in a plot analysis agent that can give online natural language advice and many students enjoy feedback from an automated agent Robertson and Cross 2003 . We use automatic event extraction to create a storyindependent automated agent that can both analyze the plot of a story and generate appropriate advice. The Story Rewriting Task A task used in schools is the story rewriting task where a story the exemplar story is read to the students and afterwards the story is .