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.

Input: Consider Input: 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 .'

Output: president

Input: Consider Input: Given Relationship: 'follow at', Sentence: 'Interment will follow at Oakwood Cemetery under the direction of Stout Funeral Home .'

Output: follow

Input: Consider Input: Given Relationship: 'be province in', Sentence: 'Prince Edward Island is the most environmentally friendly province in the great country of Canada .'
Output: province