J. Walker Orr

Also published as: Walker Orr


Event Detection with Neural Networks: A Rigorous Empirical Evaluation
Walker Orr | Prasad Tadepalli | Xiaoli Fern
Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing

Detecting events and classifying them into predefined types is an important step in knowledge extraction from natural language texts. While the neural network models have generally led the state-of-the-art, the differences in performance between different architectures have not been rigorously studied. In this paper we present a novel GRU-based model that combines syntactic information along with temporal structure through an attention mechanism. We show that it is competitive with other neural network architectures through empirical evaluations under different random initializations and training-validation-test splits of ACE2005 dataset.


Prune-and-Score: Learning for Greedy Coreference Resolution
Chao Ma | Janardhan Rao Doppa | J. Walker Orr | Prashanth Mannem | Xiaoli Fern | Tom Dietterich | Prasad Tadepalli
Proceedings of the 2014 Conference on Empirical Methods in Natural Language Processing (EMNLP)