question: Were M2 , M3 , and M4 executive produced by a film 's cinematographer and executive producer and produced by M1 's sibling
query: SELECT count(*) WHERE {
  ?x0 ns:film.cinematographer.film ?x1 .
  ?x0 ns:film.producer.films_executive_produced ?x1 .
  ?x1 a ns:film.film .
  ?x2 ns:people.person.sibling_s/ns:people.sibling_relationship.sibling|ns:fictional_universe.fictional_character.siblings/ns:fictional_universe.sibling_relationship_of_fictional_characters.siblings M1 .
  FILTER ( ?x2 != M1 ) .
  M2 ns:film.film.executive_produced_by ?x0 .
  M2 ns:film.film.produced_by|ns:film.film.production_companies ?x2 .
  M3 ns:film.film.executive_produced_by ?x0 .
  M3 ns:film.film.produced_by|ns:film.film.production_companies ?x2 .
  M4 ns:film.film.executive_produced_by ?x0 .
  M4 ns:film.film.produced_by|ns:film.film.production_companies ?x2
  }