user: Question: Who was the opponent of the match in South Dakota, United States which has 2 rounds?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Loss', '10-6-1', 'Hank Weis', 'Submission (guillotine choke)', 'Kickdown - Sturgis', 1.0, 'South Dakota , United States']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Round" = 2.0 AND "Location" = 'South Dakota, United States';