Question: What is the name of the large city in the Canadian province of Saskatchewan, where J.D. McAskill served as mayor? 
Sentence (from "Saskatoon"): The City of Saskatoon has estimated its population to be 271,000 as of July 2017, while Statistics Canada has estimated the CMA's population to have to be 315,200 as of 2016.
Relevant evidence: No