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