query: #title: Possible disambiguation in key language label
  # Complex constraint from [[Property talk:P650]]
  # Items with [[Property:P650|RKDartists ID&#32;<small dir="ltr">(P650)</small>]] with a label in either Dutch, English, German or French that looks like a disambiguation.
  SELECT DISTINCT ?item ?label WHERE {
    VALUES ?lang { "de" "en" "fr" "nl" } . 
    ?item wdt:P650 ?rkdid .
    ?item rdfs:label ?label .
    FILTER (REGEX(STR(?label), ".*\\(.*") && (!(REGEX(STR(?label), ".*\\(I.*")))) .
    FILTER( LANG( ?label ) = ?lang ) .
  } ORDER BY ?label 
  LIMIT 1000