ExcavatorCovid: Extracting Events and Relations from Text Corpora for Temporal and Causal Analysis for COVID-19 Bonan Min author Benjamin Rozonoyer author Haoling Qiu author Alexander Zamanian author Nianwen Xue author Jessica MacBride author 2021-11 text Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing: System Demonstrations Heike Adel editor Shuming Shi editor Association for Computational Linguistics Online and Punta Cana, Dominican Republic conference publication min-etal-2021-excavatorcovid 10.18653/v1/2021.emnlp-demo.8 https://aclanthology.org/2021.emnlp-demo.8/ 2021-11 63 71