question: Were M3 and M5 executive produced by M4 , executive produced by a Italian film director , and produced by M2 's sibling
query: SELECT count(*) WHERE {
  ?x0 a ns:film.director .
  ?x0 ns:people.person.nationality ns:m.03rjj .
  ?x1 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 M2 .
  FILTER ( ?x1 != M2 ) .
  M3 ns:film.film.executive_produced_by ?x0 .
  M3 ns:film.film.executive_produced_by M4 .
  M3 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
  M5 ns:film.film.executive_produced_by ?x0 .
  M5 ns:film.film.executive_produced_by M4 .
  M5 ns:film.film.produced_by|ns:film.film.production_companies ?x1
  }