user: Question: For the draft pick from round 3 out of Mercer College what is the nationality?
Columns: ['Round', 'Pick', 'Player', 'Nationality', 'College']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 19.0, 'Steve Harris', 'United States', 'Tulsa']
SQL:

assistant: SELECT "Nationality" FROM "Table" WHERE "Round" = 3.0 AND "College" = 'Mercer';