question: Did a film producer that M1 was directed by and written by found M2 , M3 , and M4
query: SELECT count(*) WHERE {
  ?x0 a ns:film.producer .
  ?x0 ns:film.director.film M1 .
  ?x0 ns:film.writer.film M1 .
  ?x0 ns:organization.organization_founder.organizations_founded M2 .
  ?x0 ns:organization.organization_founder.organizations_founded M3 .
  ?x0 ns:organization.organization_founder.organizations_founded M4
  }