query: PREFIX wikibase: <http://wikiba.se/ontology#>
  PREFIX wd: <http://www.wikidata.org/entity/> 
  PREFIX wdt: <http://www.wikidata.org/prop/direct/>
  PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
  PREFIX p: <http://www.wikidata.org/prop/>
  PREFIX q: <http://www.wikidata.org/prop/qualifier/>
  PREFIX v: <http://www.wikidata.org/prop/statement/>
  PREFIX pr: <http://www.wikidata.org/prop/reference/>
  
  PREFIX prov: <http://www.w3.org/ns/prov#> SELECT ?item ?authorAbbrev (SUBSTR(?birthdate1, 1, 4) as ?birthyear) (SUBSTR(?deathdate1, 1, 4) as ?deathyear) WHERE {
      ?item wdt:P428 ?authorAbbrev .
      ?item p:P428 ?authorabbrev1 .
      ?authorabbrev1 v:P428 ?authorabbrevValue .
      ?authorabbrev1 prov:wasDerivedFrom ?ref .
      OPTIONAL {?ref pr:P586 ?authorId} .
      OPTIONAL {?item wdt:P569 ?birthdate1} .
      OPTIONAL {?item wdt:P570 ?deathdate1} .
      FILTER (!bound(?authorId))
  }
  ORDER BY ASC(?authorAbbrev)