user: Question: What position is the player that is from Canada and on the Boston Bruins
Columns: ['Pick #', 'Player', 'Position', 'Nationality', 'NHL team', 'College/junior/club team']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['57', 'Ray Belanger', 'Goaltender', 'Canada', 'California Golden Seals', 'Shawinigan Dynamos (QMJHL)']
SQL:

assistant: SELECT "Position" FROM "Table" WHERE "Nationality" = 'Canada' AND "NHL team" = 'Boston Bruins';