Were M3 and M4 produced by and directed by a film producer employed by M1 and employed by M2
SELECT count(*) WHERE {
?x0 a ns:film.producer .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
M3 ns:film.film.directed_by ?x0 .
M3 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
M4 ns:film.film.directed_by ?x0 .
M4 ns:film.film.produced_by|ns:film.film.production_companies ?x0
}