Detailed Instructions: 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.
Q: Passage: Palestinian police tried ineffectively to prevent protestors from entering the Israeli area during the clashes, but Israeli security officials complained that not enough was done to curb the rioters. Palestinian West Bank security chief Jibril Rajub lashed out in return at the 400 settlers who live in army-guarded enclaves amid Hebron's 120,000 Arab residents.
A:
tried