query: SELECT DISTINCT ?paper ?namedAuthor {
    {
  SELECT ?author1 ?author2 ?namedAuthor {
    ?paper1 wdt:P50 ?author1 ; wdt:P50 ?author2 ; wdt:P50 ?author2 ; wdt:P2093 ?namedAuthor .
    ?paper2 wdt:P50 ?author1 ; wdt:P50 ?author2 ; wdt:P50 ?author3 ; wdt:P2093 ?namedAuthor .
    FILTER ( ?author1 != ?author2 && ?author1 != ?author3 && ?author3 != ?author2 )
    FILTER ( ?paper1 != ?paper2 )
    }
  } .
  ?paper wdt:P2093 ?namedAuthor ; wdt:P50 ?author1 ; wdt:P50 ?author2 ; wdt:P50 ?author3
  }
  LIMIT 50