user: Question: Who was the opponent after week 9 with over 49221 attending, and a Result of W 38-20?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Venue', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 27, 1959', 'Chicago Bears', 'W 9-6', 'City Stadium', 32150.0]
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Week" > 9.0 AND "Attendance" > 49221.0 AND "Result" = 'W 38-20';