Text Generation from Discourse Representation Structures

Jiangming Liu, Shay B Cohen, Mirella Lapata

Abstract:

We propose neural models to generate text from formal meaning representations based on Discourse Representation Structures
(DRSs). DRSs are document-level representations which encode rich semantic detail pertaining to rhetorical relations, presupposition, and co-reference within and across sentences. We formalize the task of neural DRS-to-text generation and provide modeling solutions for the problems of condition ordering and variable naming which render generation from DRSs non-trivial. Our generator relies on a novel sibling treeLSTM model which is able to accurately represent DRS structures and is more generally suited to trees with wide branches. We achieve competitive performance (59.48 BLEU) on the GMB benchmarkagainst several strong baselines.