tailieunhanh - Báo cáo khoa học: "A Machine Learning Approach to Extract Temporal Information from Texts in Swedish and Generate Animated 3D Scenes"

Carsim is a program that automatically converts narratives into 3D scenes. Carsim considers authentic texts describing road accidents, generally collected from web sites of Swedish newspapers or transcribed from hand-written accounts by victims of accidents. One of the program’s key features is that it animates the generated scene to visualize events. To create a consistent animation, Carsim extracts the participants mentioned in a text and identifies what they do. | A Machine Learning Approach to Extract Temporal Information from Texts in Swedish and Generate Animated 3D Scenes Anders Berglund Richard Johansson Pierre Nugues Department of Computer Science LTH Lund University SE-221 00 Lund SWeden d98ab@ richard pierre @ Abstract Carsim is a program that automatically converts narratives into 3D scenes. Carsim considers authentic texts describing road accidents generally collected from web sites of Swedish newspapers or transcribed from hand-written accounts by victims of accidents. One of the program s key features is that it animates the generated scene to visualize events. To create a consistent animation Carsim extracts the participants mentioned in a text and identifies what they do. In this paper we focus on the extraction of temporal relations between actions. We first describe how we detect time expressions and events. We then present a machine learning technique to order the sequence of events identified in the narratives. We finally report the results we obtained. 1 Extraction of Temporal Information and Scene Visualization Carsim is a program that generates 3D scenes from narratives describing road accidents Johansson et al. 2005 Dupuy et al. 2001 . It considers authentic texts generally collected from web sites of Swedish newspapers or transcribed from handwritten accounts by victims of accidents. One of Carsim s key features is that it animates the generated scene to visualize events described in the narrative. The text below a newspaper article with its translation into English illustrates the goals and challenges of it. We bracketed the entities time expressions and events and we annotated them with identifiers denoted respectively Oi tj and ek En bussolycka e1 i sodra Afghanistan kravdee2 pả torsdagen t1 20 dodsoffer o1. Ytterligare 39 personer o2 skadadese3 i olyckane4. Busseno3 var pả vag e5 fran Kandahar mot huvudstaden Kabul nar deno4 under en omkorninge6 kordee7 av vagbanano5 och .

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