query: SELECT DISTINCT ?venue ?venueLabel WHERE {
    ?item wdt:P1433 ?venue ;
          wdt:P921 ?papertopic ;
          wdt:P698 ?pmid.
    MINUS { ?venue wdt:P921 ?topic }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }
  LIMIT 100