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 unusual airing of protests against President Fidel Castro appeared aimed at warning Cuban citizens that South Florida exiles could still force the reversal of the U.S. government's decision to return Gonzalez to Cuba. Castro attended a rally Thursday by media workers at Havana's Palace of Conventions to demand Gonzalez's return.

attended