user: Question: What is the nationality for the Guard position from Bowling Green?
Columns: ['Player', 'Nationality', 'Position', 'Years for Jazz', 'School/Club Team']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Jeff Malone', 'United States', 'Shooting guard', '1991-94', 'Mississippi State']
SQL:

assistant: SELECT "Nationality" FROM "Table" WHERE "Position" = 'Guard' AND "School/Club Team" = 'Bowling Green';