Structured Tuning for Semantic Role Labeling

Tao Li, Parth Anand Jawale, Martha Palmer and Vivek Srikumar

Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics, 2020.

Abstract

Recent neural network-driven semantic role labeling (SRL) systems have shown impressive improvements in F1 scores. These improvements are due to expressive input representations, which, at least at the surface, are orthogonal to knowledge-rich constrained decoding mechanisms that helped linear SRL models. Introducing the benefits of structure to inform neural models presents a methodological challenge. In this paper, we present a structured tuning framework to improve models using softened constraints only at training time. Our framework leverages the expressiveness of neural networks and provides supervision with structured loss components. We start with a strong baseline (RoBERTa) to validate the impact of our approach, and show that our framework outperforms the baseline by learning to comply with declarative constraints. Additionally, our experiments with smaller training sizes show that we can achieve consistent improvements under low-resource scenarios.

Bib Entry

@inproceedings{li2020structured,
  author = {Li, Tao and Jawale, Parth Anand and Palmer, Martha and Srikumar, Vivek},
  title = {{Structured Tuning for Semantic Role Labeling}},
  booktitle = {Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics},
  year = {2020}
}

Vivek Srikumar