Did a film producer executive produce a film and executive produce M1 and M2
SELECT count(*) WHERE {
?x0 a ns:film.producer .
?x0 ns:film.producer.films_executive_produced ?x1 .
?x0 ns:film.producer.films_executive_produced M1 .
?x0 ns:film.producer.films_executive_produced M2 .
?x1 a ns:film.film
}