CREATE TABLE table_72616 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Record" TEXT, "Game Site" TEXT, "Attendance" FLOAT)

When it is October 18, 1981 where is the game site?
SELECT "Game Site" FROM table_72616 WHERE "Date" = 'October 18, 1981'
SELECT "Game Site" FROM "table_72616" WHERE "Date" = 'October 18, 1981'