user: Question: What's the position when the player was Justin Mapp Category:Articles with hCards with a United States nationality?
Columns: ['Year', 'Player', 'Position', 'Nationality', 'Team']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2008.0, 'Matt Jordan Category:Articles with hCards', 'Goalkeeper', 'United States', 'Montreal Impact']
SQL:

assistant: SELECT "Position" FROM "Table" WHERE "Nationality" = 'United States' AND "Player" = 'Justin Mapp Category:Articles with hCards';