user: Question: What was the pick number for the person from the United States who as drafted to the SF position from North Carolina?
Columns: ['Draft', 'Round', 'Pick', 'Nationality', 'Position', 'College/High School/Club']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1948-1 1948', '1', '9', 'United States', 'Unknown', 'California']
SQL:

assistant: SELECT "Pick" FROM "Table" WHERE "Nationality" = 'United States' AND "College/High School/Club" = 'North Carolina' AND "Position" = 'SF';