question: Were M1 , M3 , and M4 founded by M2 and founded by a director and producer of a film 's prequel
query: SELECT count(*) WHERE {
  ?x0 ns:film.director.film ?x1 .
  ?x0 ns:film.producer.film|ns:film.production_company.films ?x1 .
  ?x1 ns:film.film.sequel ?x2 .
  ?x2 a ns:film.film .
  M1 ns:organization.organization.founders ?x0 .
  M1 ns:organization.organization.founders M2 .
  M3 ns:organization.organization.founders ?x0 .
  M3 ns:organization.organization.founders M2 .
  M4 ns:organization.organization.founders ?x0 .
  M4 ns:organization.organization.founders M2
  }