user: Question: What is the nationality of the player who played Guard in 2006?
Columns: ['Name', 'Nationality', 'School/Club', 'Season(s)', 'Position(s)']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Maurice Ager Category:Articles with hCards', 'United States', 'Michigan State', '2010', 'Guard']
SQL:

assistant: SELECT "Nationality" FROM "Table" WHERE "Position(s)" = 'Guard' AND "Season(s)" = '2006';