user: Question: List all opponents in the September 23, 1984 game?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Record', 'Game Site', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 2, 1984', 'New York Jets', 'L14–23', '0–1', 'Hoosier Dome', 61148.0]
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Date" = 'September 23, 1984';