CREATE TABLE table_45829 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" TEXT)

Who was the opponent before week 12, on November 11, 1990?
SELECT "Opponent" FROM table_45829 WHERE "Week" < '12' AND "Date" = 'november 11, 1990'
SELECT "Opponent" FROM "table_45829" WHERE "Date" = 'november 11, 1990' AND "Week" < '12'