question: Were M2 and M3 executive produced by a company 's Mexican employee
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
  ?x0 ns:people.person.nationality ns:m.0b90_r .
  ?x1 a ns:business.employer .
  M2 ns:film.film.executive_produced_by ?x0 .
  M3 ns:film.film.executive_produced_by ?x0
  }