Polynomial Graph Parsing with Non-Structural Reentrancies
Johanna Björklund,
Frank Drewes,
Anna Jonsson
Abstract:Graph-based semantic representations are valuable in natural language processing, where it is often simple and effective to represent linguistic concepts as nodes, and relations as edges between them. Several attempts has been made to find a generative device that is sufficiently powerful to represent languages of semantic graphs, while at the same allowing efficient parsing. We add to this line of work by introducing graph extension grammar, which consists of an algebra over graphs together with a regular tre… Show more
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