question: Was a founder of M1 , M2 , M3 , and M4 a film director
query: SELECT count(*) WHERE {
  ?x0 a ns:film.director .
  ?x0 ns:organization.organization_founder.organizations_founded 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
  }