user: Question: Which Opponent that has a Week smaller than 7 on September 12, 1988?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 4, 1988', 'at Cincinnati Bengals', 'L 21-14', 50404.0]
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Week" < 7.0 AND "Date" = 'September 12, 1988';