question: Which editor of M2 was employed by M0 and M1 , employed by a production company , and employed by M3 's producer
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.editor.film M2 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x2 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M0 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
  ?x1 ns:film.producer.film|ns:film.production_company.films M3 .
  ?x2 a ns:film.production_company
  }