What film did M1 and M2 direct and a film producer executive produce
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.directed_by M1 .
?x0 ns:film.film.directed_by M2 .
?x0 ns:film.film.executive_produced_by ?x1 .
?x1 a ns:film.producer
}