user: Question: What is the first year that Mario Lemieux from Canada won playing Center?
Columns: ['Year', 'Player', 'Country', 'Team', 'Position']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1993.0, 'Mario Lemieux', 'Canada', 'Pittsburgh Penguins', 'Center']
SQL:

assistant: SELECT MIN("Year") FROM "Table" WHERE "Country" = 'Canada' AND "Position" = 'Center' AND "Player" = 'Mario Lemieux';