query: SELECT DISTINCT
    ?item ?pp (CONCAT("[",str(?url)," ws]") as ?ws)
    (YEAR(?dob) as ?yob)
    (YEAR(?dod) as ?yod)
    (YEAR(?dod)-YEAR(?publ) as ?y)
  WHERE
  {
    hint:Query hint:optimizer "None".
    ?entry wdt:P1433 wd:Q665807 .
    ?entry wdt:P921 ?item .
    ?entry wdt:P478 ?vol .
    
    ?volitem wdt:P179 wd:Q665807 . 
    ?volitem wdt:P478 ?vol .
    ?volitem wdt:P577 ?publ .
  
    ?item wdt:P570 ?dod . 
    FILTER( ?dod > ?publ ) 
    ?item wdt:P31 wd:Q5 .
  
    ?entry wdt:P31 wd:Q19389637 . 
    ?entry wdt:P304 ?p . BIND(CONCAT(str(YEAR(?publ)), ": vol. ",?vol,", p. ",?p) as ?pp)
    ?url schema:about ?entry ; schema:isPartOf <https://de.wikisource.org/> .
    OPTIONAL { ?item wdt:P569 ?dob }
  }