question: Were M1 and M5 founded by M2 , founded by M3 , founded by a person , and founded by M4
query: SELECT count(*) WHERE {
  ?x0 a ns:people.person .
  M1 ns:organization.organization.founders ?x0 .
  M1 ns:organization.organization.founders M2 .
  M1 ns:organization.organization.founders M3 .
  M1 ns:organization.organization.founders M4 .
  M5 ns:organization.organization.founders ?x0 .
  M5 ns:organization.organization.founders M2 .
  M5 ns:organization.organization.founders M3 .
  M5 ns:organization.organization.founders M4
  }