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.

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 .'
chairman

Given Relationship: 'be country in', Sentence: 'Canada and the countries of the Americas are proceeding with Summits and many economic liberalisation negotiations , which , if realised , will transform the political , environmental , social and economic geography of the Western Hemisphere .'
countries

Given Relationship: 'be branch of', Sentence: 'Hamas , the Palestinian branch of the Muslim Brotherhood , the organization that assassinated Anwar Sadat and spawned al Qaeda and a host of other terrorist groups , runs other camps .'
branch