question: Were M1 and M4 employed by M2 and M2 , employed by a production company 's child , and employed by M3
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent ?x1 .
  ?x1 a ns:film.production_company .
  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 M2 .
  M1 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
  M4 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0 .
  M4 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
  M4 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
  M4 ns:people.person.employment_history/ns:business.employment_tenure.company M3
  }