You will be given a definition of a task first, then some input of the task.
From the given sentence, extract the phrase (often noun or verb) that carries the given relationship. The generated phrase should be present in the sentence.

Given Relationship: 'be country of', Sentence: 'Uzbekistan is regarded as the key country in Central Asia based on the reasoning that if the situation becomes unstable in this country , it will easily spread to neighboring states , affecting the balance of power in the eastern half of Eurasia .'
Output:
country