query: SELECT ?item ?itemLabel ?regNum ?regDate
  WHERE 
  {
    BIND ("A/1471/92" as ?regNum)
    BIND ("1993-11-12T00:00:00Z"^^xsd:dateTime as ?regDate)
  
    # ?item wdt:P3424 ?regNum.
    ?item p:P3424 ?n . ?n pq:P585 ?regDate.
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }