Did a cinematographer that M1 employed and M2 employed play M3
SELECT count(*) WHERE {
?x0 a ns:film.cinematographer .
?x0 ns:film.actor.film/ns:film.performance.character M3 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2
}