question: Was a film whose director was employed by M0 and was employed by M1 , M2 , and M3 M4
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M0 .
  ?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 .
  M4 a ns:film.film .
  M4 ns:film.film.directed_by ?x0
  }