CREATE TABLE table_41910 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" FLOAT)

What is Attendance, when Opponent is Pittsburgh Steelers?
SELECT "Attendance" FROM table_41910 WHERE "Opponent" = 'pittsburgh steelers'
SELECT "Attendance" FROM "table_41910" WHERE "Opponent" = 'pittsburgh steelers'