question: Were M2 and M4 written by a production company 's employee , written by a screenwriter 's sibling , and edited by M3
query: SELECT count(*) WHERE {
  ?x0 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 ?x1 .
  ?x1 a ns:film.writer .
  ?x2 ns:people.person.employment_history/ns:business.employment_tenure.company ?x3 .
  ?x3 a ns:film.production_company .
  FILTER ( ?x0 != ?x1 ) .
  M2 ns:film.film.edited_by M3 .
  M2 ns:film.film.written_by ?x0 .
  M2 ns:film.film.written_by ?x2 .
  M4 ns:film.film.edited_by M3 .
  M4 ns:film.film.written_by ?x0 .
  M4 ns:film.film.written_by ?x2
  }