question: Who produced a film directed by and executive produced by M2
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:film.producer.film|ns:film.production_company.films ?x1 .
  ?x1 a ns:film.film .
  ?x1 ns:film.film.directed_by M2 .
  ?x1 ns:film.film.executive_produced_by M2
  }