Was M3 produced by a person employed by M1 and employed by a film distributor and edited by M4
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x1 a ns:film.film_distributor .
M3 ns:film.film.edited_by M4 .
M3 ns:film.film.produced_by|ns:film.film.production_companies ?x0
}