question: Was M2 directed by a Mexican screenwriter 's child 's parent and directed by M3
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?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.writer .
  ?x2 ns:people.person.nationality ns:m.0b90_r .
  M2 ns:film.film.directed_by ?x0 .
  M2 ns:film.film.directed_by M3
  }