question: Were M2 , M3 , and M4 employed by M1 's employer and employed by a film producer 's child
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.producer .
  ?x2 ns:business.employer.employees/ns:business.employment_tenure.person M1 .
  M2 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0 .
  M2 ns:people.person.employment_history/ns:business.employment_tenure.company ?x2 .
  M3 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0 .
  M3 ns:people.person.employment_history/ns:business.employment_tenure.company ?x2 .
  M4 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0 .
  M4 ns:people.person.employment_history/ns:business.employment_tenure.company ?x2
  }