user: Question: What is Location, when Result is 28-21?
Columns: ['Year', 'Date', 'Winner', 'Result', 'Location']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1940.0, 'September 28', 'New York Giants', '20-14', 'Connie Mack Stadium']
SQL:

assistant: SELECT "Location" FROM "Table" WHERE "Result" = '28-21';