Given the task definition and input, reply with output. 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 president of', Sentence: '2009 promises an exciting year Barack Obama will be inaugurated as the 44th President of the USA and Prime Minister Gordon Brown could call a general electionut what will the year hold for supercars ?'
President