query: #Royal Society obituaries
  SELECT ?item ?itemLabel ?doi
  WHERE 
  {
    { ?item wdt:P1433 wd:Q4914871 } UNION { ?item wdt:P1433 wd:Q29043655 } . # In Bio Memoirs RS or Obit Notices RS
    filter not exists { ?item wdt:P921 ?subject . } .
    ?item wdt:P356 ?doi . 
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }
  order by ?doi