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: They said that both Arafat and Hamas were besieged by Israel, especially the former who had been besieged for three years, but the Palestinians were never in such a crisis like that of today under the leadership of Arafat. Arafat was besieged by Israeli army in his compound in West Bank city of Ramallah in 2002 following his refusal to Israel's demands and his adherence to the Palestinian principles, in particular the Palestinians' claim to Jerusalem.

adherence