question: What British screenwriter that M1 was executive produced and produced by was employed by M2 and M3
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:film.producer.films_executive_produced M1 .
  ?x0 ns:film.producer.film|ns:film.production_company.films M1 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
  ?x0 ns:people.person.nationality ns:m.07ssc
  }