user: Question: What is the nationality of the player in round 4?
Columns: ['Round', 'Player', 'Position', 'Nationality', 'College/Junior/Club Team']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Brad Brown', 'Defenceman', 'Canada', 'North Bay Centennials (OHL)']
SQL:

assistant: SELECT "Nationality" FROM "Table" WHERE "Round" = 4.0;