user: Question: Who was the opponent when attendance was 60,355?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 9, 1990', 'Phoenix Cardinals', 'W 31-0', '52,649']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Attendance" = '60,355';