question: Was a person whose Chinese child played M3 and played M4 and M5 a actor
query: SELECT count(*) WHERE {
  ?x0 a ns:film.actor .
  ?x0 a ns:people.person .
  ?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?x1 .
  ?x1 ns:film.actor.film/ns:film.performance.character M3 .
  ?x1 ns:film.actor.film/ns:film.performance.character M4 .
  ?x1 ns:film.actor.film/ns:film.performance.character M5 .
  ?x1 ns:people.person.nationality ns:m.0d05w3
  }