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"): At its 2016 census population of 246,376, Saskatoon is the largest city in the province, while at a 2016 census population of 295,095, the Saskatoon census metropolitan area (CMA) is the 17th largest CMA in Canada.
Relevant evidence: No