user: Question: What was the nationality of player picked no. 168?
Columns: ['Pick #', 'Player', 'Position', 'Nationality', 'NHL team', 'College/junior/club team']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [163.0, 'Marty Ketola', 'Right Wing', 'United States', 'Pittsburgh Penguins', 'Cloquet High School (USHS-MN)']
SQL:

assistant: SELECT "Nationality" FROM "Table" WHERE "Pick #" = 168.0;