Question: Which attendance number was taken on November 21, 2004?
SQL: SELECT "Attendance" FROM "2-15315503-1" WHERE "Date" = 'November 21, 2004';

Question: Which attendance number was taken in a week less than 16 when the Washington Redskins were the opponents?
SQL: SELECT "Attendance" FROM "2-15315503-1" WHERE "Week" < 16.0 AND "Opponent" = 'Washington Redskins';

Question: How many weeks had the Green Bay Packers as opponents?
SQL: SELECT SUM("Week") FROM "2-15315503-1" WHERE "Opponent" = 'Green Bay Packers';