query: #Properties, their labels, descriptions and if they exist of which they are a subproperty
  #added before 2016-10
  
  SELECT ?property ?propertyLabel ?propertyDescription (lang(?propertyLabel) as ?lang)
  WHERE
  {
      ?property a wikibase:Property 
      ; rdfs:label ?propertyLabel
      ; schema:description ?propertyDescription.
      filter(lang(?propertyLabel) = lang(?propertyDescription)).
  } 
  LIMIT 100