user: Question: Which nationality is Dick Walker?
Columns: ['Round', 'Pick', 'Player', 'Nationality', 'College']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 15.0, 'John Hummer', 'United States', 'Princeton']
SQL:

assistant: SELECT "Nationality" FROM "Table" WHERE "Player" = 'Dick Walker';