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: On Monday, Sunni Sheikh Khalaf al-Alyani, a leader of the Iraqi National Dialogue, pressed Iraqi insurgents to observe a five-day truce so that the crucial vote could take place peacefully. The 228 political entities which have presented candidates number double the 111 groups that contested the January poll.

observe