Definition: In this task, a passage will be given and the goal is to identify an event from the passage. An event is defined as a single word representing something that happened, is happening, or may happen. An event can be factual or hypothetical, positive or negative, certain or uncertain. While most events are based on verbs, an event can also be based on a noun (ex. storm, snow, rainfall) or a copula verb (is, was, been, etc.). The event must not be a pronoun or an adjective. For noun events with multiple words, use the last word in the phrase as event.
Input: Passage: But Steiner said that in banning the officials, Petric had "violated the constitution of Bosnia-Hercegovina." The trial opened in the eastern Bosnian town of Zvornik, in Serb- controlled territory, which was the scene of some of the most brutal "ethnic cleansing" of non-Serbs during Bosnia's 43-month war.

war