query: #title: Items with anonymous creator and no inception
  # Complex constraint from [[Property talk:P4765]]
  # These items have an unknown creator and no inception so no way to know the work is in the public domain due to age.
  SELECT ?item WHERE {
    ?item wdt:P4765 ?url .
    ?item wdt:P170 wd:Q4233718  .
    MINUS { ?item wdt:P571 ?inception } .
    } LIMIT 1000