question: Was a British person that M2 , M3 , M4 , M5 , M6 , and M7 were edited by and starred M0
query: SELECT count(*) WHERE {
  M0 a ns:people.person .
  M0 ns:film.actor.film/ns:film.performance.film M2 .
  M0 ns:film.actor.film/ns:film.performance.film M3 .
  M0 ns:film.actor.film/ns:film.performance.film M4 .
  M0 ns:film.actor.film/ns:film.performance.film M5 .
  M0 ns:film.actor.film/ns:film.performance.film M6 .
  M0 ns:film.actor.film/ns:film.performance.film M7 .
  M0 ns:film.editor.film M2 .
  M0 ns:film.editor.film M3 .
  M0 ns:film.editor.film M4 .
  M0 ns:film.editor.film M5 .
  M0 ns:film.editor.film M6 .
  M0 ns:film.editor.film M7 .
  M0 ns:people.person.nationality ns:m.07ssc
  }