Paper: A Shortest-path Method for Arc-factored Semantic Role Labeling

ACL ID D14-1049
Title A Shortest-path Method for Arc-factored Semantic Role Labeling
Venue Conference on Empirical Methods in Natural Language Processing
Session Main Conference
Year 2014
Authors

We introduce a Semantic Role Labeling (SRL) parser that finds semantic roles for a predicate together with the syntactic paths linking predicates and arguments. Our main contribution is to formulate SRL in terms of shortest-path inference, on the as- sumption that the SRL model is restricted to arc-factored features of the syntactic paths behind semantic roles. Overall, our method for SRL is a novel way to ex- ploit larger variability in the syntactic re- alizations of predicate-argument relations, moving away from pipeline architectures. Experiments show that our approach im- proves the robustness of the predictions, producing arc-factored models that per- form closely to methods using unrestricted features from the syntax.