question: Were M2 , M4 , M5 , M6 , and M7 executive produced by a British person and written by M3
query: SELECT count(*) WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:people.person.nationality ns:m.07ssc .
  M2 ns:film.film.executive_produced_by ?x0 .
  M2 ns:film.film.written_by M3 .
  M4 ns:film.film.executive_produced_by ?x0 .
  M4 ns:film.film.written_by M3 .
  M5 ns:film.film.executive_produced_by ?x0 .
  M5 ns:film.film.written_by M3 .
  M6 ns:film.film.executive_produced_by ?x0 .
  M6 ns:film.film.written_by M3 .
  M7 ns:film.film.executive_produced_by ?x0 .
  M7 ns:film.film.written_by M3
  }