question: Was M5 's American actor employed by M0 , employed by M1 and M2 , and employed by M3
query: SELECT count(*) WHERE {
  ?x0 ns:film.actor.film/ns:film.performance.character M5 .
  ?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 .
  ?x0 ns:people.person.nationality ns:m.09c7w0
  }