Question: What is the population of the city where The Château du Grand-Blottereau is located ?
Sentence (from "Nantes"): Nantes (] ) (Gallo: "Naunnt" or "Nantt" (] or ] ); Breton: "Naoned" (] ) ) is a city in western France on the Loire River, 50 km from the Atlantic coast.
Relevant evidence: No