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 Q]: Given Relationship: 'be chairman of', Sentence: 'Warner , an influential Republican and former chairman of the Senate Armed Services Committee , on Thursday recommended that Bush announce the beginning of a U.S. withdrawal in mid-September and that those troops should be back in the United States by Christmas .'
[EX A]: chairman

[EX Q]: Given Relationship: 'be chairman of', Sentence: 'President Bush named his top economic advisor , Ben Bernanke to replace economic legend Alan Greenspan as the chairman of the Federal Reserve .'
[EX A]: chairman

[EX Q]: Given Relationship: 'be build', Sentence: 'Not by our power and wisdom shall we build the Kingdom of God , but alone by the power and wisdom of God , given unto us in His word and sacraments .'
[EX A]:
build