query: #title: value label (experimental)
  # Complex constraint from [[Property talk:P1791]]
  # compares label of value with label of subject per regex for language at [[Property:P1791#P1552]]: [[d:Q100883797|complex constraint value label template <small>(Q100883797)</small>]]
  SELECT ?item ?lang ?l ?value ?v ?t ?check
  WHERE 
  {
    hint:Query hint:optimizer "None".
    wd:P1791 p:P1552 [ ps:P1552 wd:Q100883797 ; pq:P1450 ?t ]
    BIND( lang(?t) as ?lang) 
    ?item wdt:P1791 ?value .
    ?item rdfs:label ?l . FILTER(lang(?l) = ?lang) 
    ?value rdfs:label ?v . FILTER(lang(?v) = ?lang)
    BIND ( REPLACE(str(?l), "^(.+)$", str(?t)) as ?check) 
    FILTER ( !REGEX(str(?v), ?check)  )
  }
  LIMIT 350