question: Was M0 's prequel directed by , written by , executive produced by , and produced by M1 's employee
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.directed_by ?x1 .
  ?x0 ns:film.film.executive_produced_by ?x1 .
  ?x0 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
  ?x0 ns:film.film.sequel M0 .
  ?x0 ns:film.film.written_by ?x1 .
  ?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M1
  }