question: Were M1 and M2 written by a production company 's child 's employee
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
  ?x1 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent ?x2 .
  ?x2 a ns:film.production_company .
  M1 ns:film.film.written_by ?x0 .
  M2 ns:film.film.written_by ?x0
  }