CREATE TABLE table_55985 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" FLOAT)

What is the average attendance on October 9, 1983?
SELECT AVG("Attendance") FROM table_55985 WHERE "Date" = 'october 9, 1983'
SELECT AVG("Attendance") FROM "table_55985" WHERE "Date" = 'october 9, 1983'