question: Was M0 a British film editor that edited M2 and executive produced M3
query: SELECT count(*) WHERE {
  M0 a ns:film.editor .
  M0 ns:film.editor.film M2 .
  M0 ns:film.producer.films_executive_produced M3 .
  M0 ns:people.person.nationality ns:m.07ssc
  }