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.

Example 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 .'
Example Output: president

Example Input: Given Relationship: 'be president of', Sentence: 'Barack Obama today becomes the first black president of the United States of America .'
Example Output: president

Example Input: Given Relationship: 'be waste on', Sentence: 'Youth may be wasted on the young , but it 's not all that easy getting older either ...'
Example Output:
wasted