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 mayor of', Sentence: 'And former New York mayor Rudy Giuliani suggested men of a certain age get checked for prostate cancer , following in the footsteps of former US senator Bob Dole , whose appearances in Viagra ads are credited with persuading more men to discuss erectile dysfunction with their doctors .'
mayor

Given Relationship: 'be arrest in', Sentence: 'Selma is a city where Martin Luther King Jr. was arrested on Feb 1 , 1965 , while protesting voter registration regulations .'
arrested

Given Relationship: 'be chair by', Sentence: 'The Executive Director and Chair of the Board were amazed he would even consider it .'

Chair