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.
Q: Given Relationship: 'be chairman of', Sentence: 'Dear All , I wanted you to hear the exciting news that Governor Howard Dean , who was Chairman of the Democratic National Committee during President Obama 's election campaign , has agreed to be our guest speaker at the Liberal Democrat Spring confere ...'
A:
Chairman