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: Armed with new powers granted by an emergency session of the New South Wales state parliament, police set up check points on a number of main roads in Sydney's troubled southern suburbs. A wave of arrests followed after several incidents, including a Molotov cocktail thrown at police, an elderly man attacked with a crowbar and an officer injured in a brawl, Assistant Commissioner Dave Owens told the national AAP news agency.

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