query: #title: Qualifier for none-of constraint
  # Complex constraint from [[Property talk:P9729]]
  # This qualifier is generally used for [[d:Q52558054|none-of constraint <small>(Q52558054)</small>]]. TODO: double-check
  SELECT ?item ?constraint ?repvalue
  {
      ?item p:P2302 [ pq:P9729 ?repvalue ; ps:P2302 ?constraint ]
      FILTER( ?constraint != wd:Q52558054 )           
  }