Extending a Surface Realizer to Generate Coherent Discourse

We present a discourse-level Tree Adjoining Grammar which tightly integrates syntax and discourse levels, including a representation for discourse entities. We show that this technique makes it possible to extend an optimisation algorithm used in natural language generation (polarity filtering) to the discourse level. We implemented the grammar in a surface realizer and show that this technique can be used to reduce the search space by filtering out referentially incoherent solutions.

• Type: Journal
• Year: 2009
• Where: ACL
• Authors: Eva Banik
• Keywords: ACL 2009, Computational Linguistics, Discourse Level, Natural Language Generation, Tree Adjoining Grammar