question: Was M2 executive produced by M3 , M4 , M5 , and M6 and produced by M0 's Mexican founder
query: SELECT count(*) WHERE {
  ?x0 ns:organization.organization_founder.organizations_founded M0 .
  ?x0 ns:people.person.nationality ns:m.0b90_r .
  M2 ns:film.film.executive_produced_by M3 .
  M2 ns:film.film.executive_produced_by M4 .
  M2 ns:film.film.executive_produced_by M5 .
  M2 ns:film.film.executive_produced_by M6 .
  M2 ns:film.film.produced_by|ns:film.film.production_companies ?x0
  }