question: Was M1 's sequel directed by M2 , produced by M3 's employee , and executive produced by M0
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.directed_by M2 .
  ?x0 ns:film.film.executive_produced_by M0 .
  ?x0 ns:film.film.prequel M1 .
  ?x0 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
  ?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M3
  }