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