question: Did a film producer found M1 , found M2 , found M3 , and found M4
query: SELECT count(*) WHERE {
  ?x0 a ns:film.producer .
  ?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
  }