query: # A list of instance of painting with collection Museu d'Art Jaume Morera, but no inventory number
  SELECT ?item ?itemLabel ?creatorLabel WHERE {
    ?item wdt:P31 wd:Q3305213.
    ?item wdt:P195 wd:Q5476145.
    MINUS { ?item wdt:P217 _:b3. }
    OPTIONAL { ?item wdt:P170 ?creator. }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "ca". }
  }
    ORDER BY ?creatorLabel