Nan Xu Hongming Zhang 0009 Jianshu Chen CEO: Corpus-based Open-Domain Event Ontology Induction. 946-964 2024 EACL (Findings) https://aclanthology.org/2024.findings-eacl.64 conf/eacl/2024f db/conf/eacl/eacl2024f.html#XuZC24