user: Question: Tell me the nationality for pick of 18
Columns: ['Pick', 'Player', 'Position', 'Nationality', 'NHL team', 'College/junior/club team']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1', 'Ed Jovanovski', 'Defence', 'Canada', 'Florida Panthers', 'Windsor Spitfires ( OHL )']
SQL:

assistant: SELECT "Nationality" FROM "Table" WHERE "Pick" = '18';