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: 'Ayers recruited Obama to serve as chairman on the $ 100 million Chicago Annenberg Challenge and they worked together for seven years handing out grants to the 'educational ' projects of people like ... William Ayers .'
A:
chairman