user: ### NOW ANSWER:
Question: Which sum of week that had an attendance larger than 55767 on September 28, 1986?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 7, 1986', 'Cincinnati Bengals', 'W 24–14', 43430.0]
SQL:

assistant: SELECT SUM("Week") FROM "Table" WHERE "Attendance" > 55767.0 AND "Date" = 'September 28, 1986';