Department of Sociology2024-11-092021978-1-954085-79-4N/A2-s2.0-85119310309N/Ahttps://hdl.handle.net/20.500.14288/6579We analyze the effect of further pre-training BERT with different domain specific data as an unsupervised domain adaptation strategy for event extraction. Portability of event extraction models is particularly challenging, with large performance drops affecting data on the same text genres (e.g., news). We present PROTEST-ER, a retrained BERT model for protest event extraction. PROTEST-ER outperforms a corresponding generic BERT on out-of-domain data of 8.1 points. Our best performing models reach 51.91-46.39 F1 across both domains.Computer scienceArtificial intelligenceLinguisticsConference proceeding6948531000045698