query: #defaultView:Graph
  SELECT ?item ?itemLabel ?cited_works ?cited_worksLabel 
  WHERE
  {
      ?item  wdt:P31 wd:Q1643932 .   # instance = ttrpg
      ?item  wdt:P2860    ?cited_works  .   # which cites works
      ?cited_works wdt:P31 wd:Q1643932      .   # that are TTRPG  
      SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
  }
  