query: sparql?query=SELECT ?romanzo ?romanzoLabel ?year WHERE {
    ?romanzo wdt:P31 wd:Q571.
    ?romanzo wdt:P674 wd:Q830561.
    OPTIONAL { ?romanzo wdt:P577 ?year. }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "it". }
    
  }
  ORDER BY ?year