query: #title: Every country should have this property
  # Complex constraint from [[Property talk:P1082]]
  # TODO: add P1082
  SELECT ?item 
  {
      ?item wdt:P31 wd:Q6256 . 
      FILTER NOT EXISTS { ?item wdt:P1082 [] } .
      FILTER NOT EXISTS { ?item wdt:P31 wd:Q3024240 } .
  }