user: Question: Who did the Raiders play in week 12?
Columns: ['Week', 'Opponent', 'Result', 'Game site', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'at San Francisco 49ers', 'L 44–14', 'Candlestick Park', '68,032']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Week" = 12.0;