user: Question: What nationality has a year larger than 2009 with a position of Power forward?
Columns: ['Year', 'Player', 'Nationality', 'Position', 'Team']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1993.0, 'Michael Jordan Category:Articles with hCards', 'United States', 'Shooting guard', 'Chicago Bulls']
SQL:

assistant: SELECT "Nationality" FROM "Table" WHERE "Year" > 2009.0 AND "Position" = 'Power forward';