question: Were M4 , M5 , and M6 founded by a film producer that wrote M2 and M3 and edited M1
query: SELECT count(*) WHERE {
  ?x0 a ns:film.producer .
  ?x0 ns:film.editor.film M1 .
  ?x0 ns:film.writer.film M2 .
  ?x0 ns:film.writer.film M3 .
  M4 ns:organization.organization.founders ?x0 .
  M5 ns:organization.organization.founders ?x0 .
  M6 ns:organization.organization.founders ?x0
  }