A Thematic Hierarchy for Efficient Generation from Lexical-Conceptual Structure
Bonnie Jean Dorr, Nizar Y. Habash, David R. Traum · 1998
This paper describes an implemented algorithm for syntactic realization of a target-language sentence from an interlingual representation called Lexical Conceptual Structure (LCS).We provide a mapping between LCS thematic roles and Abstract Meaning Representation (AMR) relations; these relations serve as input to an o -the-shelf generator (Nitrogen).There are two contributions of this work: (1) the development of a thematic hierarchy that provides ordering information for realization of arguments in their surface positions; (2) the provision of a diagnostic tool for detecting inconsistencies in an existing online LCS-based lexicon that allows us to enhance principles for thematic-role assignment.