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.
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Question: Given Relationship: 'be chairman of', Sentence: 'Alan Greenspan , Chairman of the Board of Governors of the Federal Reserve System , gave the conference keynote address .'

Answer: Chairman


Question: Given Relationship: 'consist of', Sentence: 'HKIMRCM is managed by its Executive Management Committee consisting of President and two Vice Presidents .'

Answer: consisting


Question: Given Relationship: 'be head of', Sentence: 'The service has been dubbed Derivatives Collateral Net and automatically aggregates and nets the overall collateral obligations of its participants , explains Art Certosimo , executive vice president and head of Broker-Dealer Services at the bank .'

Answer:
head