CREATE TABLE table_74553 ("Date" CLOB, "Opponent" CLOB, "Venue" CLOB, "Result" CLOB, "Attendance" CLOB)

What is the attendance rate for the Middlesbrough opponent?
SELECT "Attendance" FROM table_74553 WHERE "Opponent" = 'middlesbrough'
SELECT "Attendance" FROM "table_74553" WHERE "Opponent" = 'middlesbrough'