user: Question: Who was the opponent on September 17?
Columns: ['Date', 'Opponent', 'Score', 'Loss', 'Attendance', 'Record']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['September 1', '@ Giants', '2–1', 'Speier (3–2)', 41034.0, '59–75']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Date" = 'September 17';