This task is proposed in 2016 by Ruihong et al.
- ↑ Huang, Ruihong, Ignacio Cases, Dan Jurafsky, Cleo Condoravdi, and Ellen Riloff. "Distinguishing past, on-going, and future events: The eventstatus corpus." In Proceedings of the 2016 Conference on Empirical Methods in Natural Language Processing, pp. 44-54.