Zhou, Y., Chen, Y., Zhao, J., Wu, Y., Xu, J., & Li, J. (2021). What the Role is vs. What Plays the Role: Semi-Supervised Event Argument Extraction via Dual Question Answering. Proceedings of the AAAI Conference on Artificial Intelligence, 35(16), 14638-14646. https://doi.org/10.1609/aaai.v35i16.17720