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 island in', Sentence: 'Cuba is the bigger island extension of the biggest Antilles .'
answer:
island


question:
Given Relationship: 'be run against', Sentence: 'But I bet McCain will make the run against Clinton , or less likely Obama , and he will win .'
answer:
against


question:
Given Relationship: 'be chairman of', Sentence: 'The term was used by Alan Greenspan , chairman of the Federal Reserve Board , at a black-tie dinner speech in Washington on December 5 , 1996 .'
answer:

chairman