query: SELECT ?author ?authorLabel ?country_of_citizenship ?country_of_citizenshipLabel WHERE {
    ?author wdt:P31 wd:Q5;
      wdt:P106 wd:Q482980;
      wdt:P27 _:b1.
    _:b1 wdt:P463 wd:Q458.
    ?author wdt:P570 ?died.
    FILTER((YEAR(?died)) = ((YEAR(NOW())) - 71 ))
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
    OPTIONAL { ?author wdt:P27 ?country_of_citizenship. }
  }
  ORDER BY (?authorLabel)