user: Question: Which Attendance has a Result of w 23-21, and a Week smaller than 5?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 8, 1985', 'Kansas City Chiefs', 'L 47-27', 57760.0]
SQL:

assistant: SELECT "Attendance" FROM "Table" WHERE "Result" = 'w 23-21' AND "Week" < 5.0;