user: Question: What is the nationality of the draft pick player who plays Centre position and is going to Calgary Flames?
Columns: ['Pick #', 'Player', 'Position', 'Nationality', 'NHL team', 'College/junior/club team']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [22.0, 'Adam Foote', 'Defence', 'Canada', 'Quebec Nordiques', 'Sault Ste. Marie Greyhounds (OHL)']
SQL:

assistant: SELECT "Nationality" FROM "Table" WHERE "Position" = 'Centre' AND "NHL team" = 'Calgary Flames';