user: Question: What stadium has a final score of 26–21?
Columns: ['Date', 'Visiting Team', 'Final Score', 'Host Team', 'Stadium']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['September 7', 'Miami Dolphins', '17–28', 'Pittsburgh Steelers', 'Heinz Field']
SQL:

assistant: SELECT "Stadium" FROM "Table" WHERE "Final Score" = '26–21';