question: Was M4 a film editor whose sibling executive produced M1 , directed M2 and M3 , and edited M0
query: SELECT count(*) WHERE {
  ?x0 ns:film.director.film M2 .
  ?x0 ns:film.director.film M3 .
  ?x0 ns:film.editor.film M0 .
  ?x0 ns:film.producer.films_executive_produced M1 .
  FILTER ( M4 != ?x0 ) .
  M4 a ns:film.editor .
  M4 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 ?x0
  }