CREATE TABLE table_6010 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Venue" TEXT, "Attendance" FLOAT)

What was the earliest week with a game against the Pittsburgh Steelers at City Stadium attended by less than 32,012?
SELECT MIN("Week") FROM table_6010 WHERE "Attendance" < '32,012' AND "Venue" = 'city stadium' AND "Opponent" = 'pittsburgh steelers'
SELECT MIN("Week") FROM "table_6010" WHERE "Attendance" < '32,012' AND "Opponent" = 'pittsburgh steelers' AND "Venue" = 'city stadium'