Q: 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: 'Pennsylvania Republican Sen. Arlen Specter , chairman of the U.S. Senate Judiciary Committee , told re****ters the panel would hold a hearing Feb. 2 to try to establish medical criteria for silica claims .'
A:
chairman