question: Was M1 employed by M2 and M3 , employed by a film producer , and employed by M4 , M5 , M6 , and M7
query: SELECT count(*) WHERE {
  ?x0 a ns:film.producer .
  M1 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0 .
  M1 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
  M1 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
  M1 ns:people.person.employment_history/ns:business.employment_tenure.company M4 .
  M1 ns:people.person.employment_history/ns:business.employment_tenure.company M5 .
  M1 ns:people.person.employment_history/ns:business.employment_tenure.company M6 .
  M1 ns:people.person.employment_history/ns:business.employment_tenure.company M7
  }