user: Question: Who is the opponent after week 9 at Rich Stadium?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Game site', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, '1997-08-31', 'Seattle Seahawks', 'W 41–3', 'Kingdome', '53,893']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Week" > 9.0 AND "Game site" = 'Rich Stadium';