Calculate average scene per act in Antony and Cleopatra.
Antony and Cleopatra refers to Title = 'Antony and Cleopatra'; average scene per act = divide(sum(Scene), count(act))

SELECT CAST(SUM(T2.Scene) AS REAL) / COUNT(T2.act) FROM works AS T1 INNER JOIN chapters AS T2 ON T1.id = T2.work_id WHERE T1.Title = 'Antony and Cleopatra'