question: Were M3 and M4 produced by a company 's American employee and executive produced by M0 's star
query: SELECT count(*) WHERE {
  ?x0 ns:film.actor.film/ns:film.performance.film M0 .
  ?x1 ns:people.person.employment_history/ns:business.employment_tenure.company ?x2 .
  ?x1 ns:people.person.nationality ns:m.09c7w0 .
  ?x2 a ns:business.employer .
  M3 ns:film.film.executive_produced_by ?x0 .
  M3 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
  M4 ns:film.film.executive_produced_by ?x0 .
  M4 ns:film.film.produced_by|ns:film.film.production_companies ?x1
  }