question: Which film producer was founded by M1 , employed a star of M3 , M4 , and M5 , and employed M2
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.producer .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M2 .
  ?x0 ns:organization.organization.founders M1 .
  ?x1 ns:film.actor.film/ns:film.performance.film M3 .
  ?x1 ns:film.actor.film/ns:film.performance.film M4 .
  ?x1 ns:film.actor.film/ns:film.performance.film M5
  }