user: Question: What is the nationality of the Center?
Columns: ['Player', 'Nationality', 'Position', 'Years for Jazz', 'School/Club Team']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Aleksandar Radojević', 'Serbia', 'Center', '2004-05', 'Barton College']
SQL:

assistant: SELECT "Nationality" FROM "Table" WHERE "Position" = 'Center';