question: Was a actor that executive produced M1 and M2 employed by M3 and employed by a employer of M4 and M5
query: SELECT count(*) WHERE {
  ?x0 a ns:film.actor .
  ?x0 ns:film.producer.films_executive_produced M1 .
  ?x0 ns:film.producer.films_executive_produced M2 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
  ?x1 ns:business.employer.employees/ns:business.employment_tenure.person M4 .
  ?x1 ns:business.employer.employees/ns:business.employment_tenure.person M5
  }