user: Question: What Opponent has an Attendance that is 26,880?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 6, 1992', 'Kansas City Chiefs', 'L 24–10', '45,024']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Attendance" = '26,880';