Which cinematographer was employed by M4 's writer 's employer and employed by M1 , M2 , and M3
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.cinematographer .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
?x1 ns:business.employer.employees/ns:business.employment_tenure.person ?x2 .
?x2 ns:film.writer.film M4
}