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 mayor of', Sentence: 'I first met Lou Cahill in the garden next to Mackenzie House , the last home of William Lyon Mackenzie , Toronto 's first mayor and instigator of the ill-fated 1837 Rebellion .'
A:
mayor