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This paper presents our submission to the 2022 edition of the CASE 2021shared task 1, subtask 4. The EventGraph system adapts an end-to-end,graph-based semantic parser to the task of Protest Event Extraction and morespecifically subtask 4 on event trigger and argument extraction. We experimentwith various graphs, encoding the events as either "labeled-edge" or"node-centric" graphs. We show that the "node-centric" approach yields bestresults overall, performing well across the three languages of the task, namelyEnglish, Spanish, and Portuguese. EventGraph is ranked 3rd for English andPortuguese, and 4th for Spanish. Our code is available at:https://github.com/huiling-y/eventgraph_at_case

EventGraph at CASE 2021 Task 1: A General Graph-based Approach to Protest Event Extraction