TASK DEFINITION: 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.
PROBLEM: Given Relationship: 'be island of', Sentence: 'Jamaica is the third largest island in the Caribbean , after Hispaniola and Cuba .'

SOLUTION: island

PROBLEM: 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 .'

SOLUTION: Chairman

PROBLEM: Given Relationship: 'be president of', Sentence: 'Barrack Obama , becomes the 44th president of the United States .'

SOLUTION:
president