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: Moscow, infuriated by the arrests, has imposed an economic blockade on Tbilisi by cutting transport and postal links, and has deported Georgians accused of staying in Russia illegally. Ties between Moscow and Tbilisi have been strained by tensions over Georgia's breakaway regions of South Ossetia and Abkhazia and the country's bid to join NATO since President Mikhail Saakashvili came to power in 2003.

tensions