Among the coaches who have received an award after the year 1940, how many of them have already died?
after the year 1940 refers to year>1940; have already died refers to deathYear IS NOT NULL
SELECT COUNT(T1.coachID) FROM Master AS T1 INNER JOIN AwardsCoaches AS T2 ON T1.coachID = T2.coachID WHERE T1.deathYear IS NOT NULL AND T2.year > 1940