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.

Ex Input:
Given Relationship: 'return to', Sentence: 'Then John rode off into the northern January cold of 1777 to return to Philadelphia .'

Ex Output:
return


Ex Input:
Given Relationship: 'be chairman of', Sentence: 'Alan Greenspan , the Chairman of the U.S. Federal Reserve , the current U.S. administration , and U.S. politicians of all stripes could teach a few lessons to those who dictated the level of inflation ahead of them .'

Ex Output:
Chairman


Ex Input:
Given Relationship: 'be center of', Sentence: 'The civic and cultural center of modern Israel extends from western Jerusalem toward the country 's other urban areas to the west , while areas populated mostly by Arabs can be found in the northern , eastern and southern districts .'

Ex Output:

center