TAILIEUCHUNG - Báo cáo khoa học: "Empirically-based Control of Natural Language Generation"

In this paper we present a new approach to controlling the behaviour of a natural language generation system by correlating internal decisions taken during free generation of a wide range of texts with the surface stylistic characteristics of the resulting outputs, and using the correlation to control the generator. This contrasts with the generate-andtest architecture adopted by most previous empirically-based generation approaches, offering a more efficient, generic and holistic method of generator control. . | Empirically-based Control of Natural Language Generation Daniel S. Paiva Department of Informatics University of Sussex Brighton UK danielpa@ Abstract In this paper we present a new approach to controlling the behaviour of a natural language generation system by correlating internal decisions taken during free generation of a wide range of texts with the surface stylistic characteristics of the resulting outputs and using the correlation to control the generator. This contrasts with the generate-and-test architecture adopted by most previous empirically-based generation approaches offering a more efficient generic and holistic method of generator control. We illustrate the approach by describing a system in which stylistic variation in the sense of Biber 1988 can be effectively controlled during the generation of short medical information texts. 1 Introduction This paper1 is concerned with the problem of controlling the output of natural language generation NLG systems. In many application scenarios the generator s task is underspecified resulting in multiple possible solutions texts expressing the desired content all equally good to the generator but not equally appropriate for the application. Customising the generator directly to overcome this generally leads to ad-hoc non-reusable solutions. A more modular approach is a generate-and-test architecture in which all solutions are generated and then ranked or otherwise selected according to their appropriateness in a separate post- 1 Paiva and Evans 2004 provides an overview of our framework and detailed comparison with previous approaches to stylistic control like Hovy 1988 Green and DiMarco 1993 and Langkilde-Geary 2002 . This paper provides a more detailed account of the system and reports additional experimental results. Roger Evans Information Technology Research Institute University of Brighton Brighton UK process. Such architectures have been particularly prominent

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