question: Did a actor whose child executive produced a film executive produce M1
query: SELECT count(*) WHERE {
  ?x0 a ns:film.actor .
  ?x0 ns:film.producer.films_executive_produced M1 .
  ?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?x1 .
  ?x1 ns:film.producer.films_executive_produced ?x2 .
  ?x2 a ns:film.film
  }