question: Did a actor that M1 and M2 were founded by found M3 and M4
query: SELECT count(*) WHERE {
  ?x0 a ns:film.actor .
  ?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
  }