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: The official Guangzhou Daily newspaper did not give the name or title of the official or specify when he had been detained but said he had been arrested for his decision to open fire on the villagers' demonstration. China on Saturday broke its silence on the protest, acknowledging demonstrators were killed when police opened fire and put the death toll at three -- far fewer than the dozens described by residents.

acknowledging