user: Question: How many different nationalities do the players of New Jersey Devils come from?
Columns: ['Pick', 'Player', 'Position', 'Nationality', 'NHL team', 'College/junior/club team']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [53.0, 'Corey Neilson', 'Defence', 'Canada', 'Edmonton Oilers', 'North Bay Centennials (OHL)']
SQL:

assistant: SELECT COUNT("Nationality") FROM "Table" WHERE "NHL team" = 'New Jersey Devils';