How many scenes are there in the 5th act of "History of Henry VIII"?
5th act refers to Act = 5; "History of Henry VIII" refers to LongTitle = 'History of Henry VIII'
SELECT SUM(T2.Scene) FROM works AS T1 INNER JOIN chapters AS T2 ON T1.id = T2.work_id WHERE T2.Act = 5 AND T1.LongTitle = 'History of Henry VIII'