query: #title: Items with creator who died after 1923 and no inception
  # Complex constraint from [[Property talk:P4765]]
  # After 1923 copyright starts getting more complicated. We need to know the inception to figure out if it's in the public domain.
  SELECT ?item {
    ?item p:P4765 [].
    ?item wdt:P170 ?creator .
    ?creator wdt:P570 ?dod . BIND(YEAR(?dod) AS ?deathyear)
    FILTER(?deathyear >= 1923) .
    MINUS { ?item wdt:P571 [] } . 
    } LIMIT 1000