user: Question: What is the nationality of the player whose college/junior/club team (league) is Seattle Thunderbirds (WHL)?
Columns: ['Round', 'Pick #', 'Player', 'Position', 'Nationality', 'College/junior/club team (league)']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, '26', 'Stefan Bergqvist', 'Defense', 'Sweden', 'Leksands IF ( SEL )']
SQL:

assistant: SELECT "Nationality" FROM "Table" WHERE "College/junior/club team (league)" = 'Seattle Thunderbirds (WHL)';