instruction:
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.
question:
Given Relationship: 'be president of', Sentence: 'When Barack Obama became the 44th president of United States , there was a sense of ecstasy , joy and relief in virtually every country of the world , except in Pakistan , Iraq and Afghanistan .'
answer:
president

question:
Given Relationship: 'be man of', Sentence: 'David was a man after God 's own heart , and yet he had sins of his youth which reproached him .'
answer:
man

question:
Given Relationship: 'be president of', Sentence: 'President-elect Barack Obama will be the 44th President of the United States of America .'
answer:
President