query: SELECT ?item ?named ?vol ?pages (CONCAT("[[:w:de:",?lemma,"]]") AS ?wikipedia) WHERE {
    ?item wdt:P31 wd:Q5.
    ?item wdt:P1343 wd:Q106311089.
    ?item p:P1343 ?statement.
    OPTIONAL {?statement pq:P1810 ?named ; ps:P1343 wd:Q106311089.}
    OPTIONAL {?statement pq:P478 ?vol ; ps:P1343 wd:Q106311089.}
    OPTIONAL {?statement pq:P304 ?pages ; ps:P1343 wd:Q106311089.}
    OPTIONAL {?sitelink schema:about ?item;
      schema:isPartOf <https://de.wikipedia.org/>;
      schema:name ?lemma.  }
    }