question: Were M2 and M4 written by M3 and edited by M1 's actor 's British sibling 's parent
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?x1 .
  ?x1 ns:people.person.nationality ns:m.07ssc .
  ?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 ?x2 .
  ?x2 ns:film.actor.film/ns:film.performance.character M1 .
  FILTER ( ?x1 != ?x2 ) .
  M2 ns:film.film.edited_by ?x0 .
  M2 ns:film.film.written_by M3 .
  M4 ns:film.film.edited_by ?x0 .
  M4 ns:film.film.written_by M3
  }