query: #defaultView:Graph
  #SELECT ?item1 ?item1Label ?item2 ?item2Label ?paper WHERE {
  SELECT ?item1 ?item1Label ?item2 ?item2Label WHERE {
    ?e wdt:P361* wd:Q487556.
    ?item1 wdt:P108 ?e.
    ?item2 wdt:P108 ?e.
    ?paper wdt:P50 ?item1 .
    ?paper wdt:P50 ?item2 .
  FILTER( ?item1 != ?item2 ) .
  SERVICE wikibase:label { bd:serviceParam wikibase:language "en" } .
  }