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 European Union (EU) has upgraded its representation level in Sri Lanka to maintain good relations between EU and the Indian Ocean island country, Sri Lanka's Ministry of Foreign Affairs said Thursday in a press release. EU's delegation is now a fully-fledged diplomatic mission with an accredited Head of Delegation of ambassadorial rank based in Colombo, said the press release.

maintain