query: SELECT ?person ?personLabel ?artukLabel ?ULANLabel ?OBINLabel
  WHERE {
   
    ?person wdt:P1367 ?dummy1.
    
    OPTIONAL{?person wdt:P1367 ?artuk .} 
    OPTIONAL{?person wdt:P245 ?ULAN .} 
    OPTIONAL{?person wdt:P1415 ?OBIN .}
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
  }