question: Was M1 written by a person and executive produced by M2 , M3 , M4 , M5 , M6 , and M7
query: SELECT count(*) WHERE {
  ?x0 a ns:people.person .
  M1 ns:film.film.executive_produced_by M2 .
  M1 ns:film.film.executive_produced_by M3 .
  M1 ns:film.film.executive_produced_by M4 .
  M1 ns:film.film.executive_produced_by M5 .
  M1 ns:film.film.executive_produced_by M6 .
  M1 ns:film.film.executive_produced_by M7 .
  M1 ns:film.film.written_by ?x0
  }