query: SELECT DISTINCT ?p ?pLabel ?pDescription WHERE {
    # Wikidata property with datatype external identifier
    ?p wikibase:propertyType wikibase:ExternalId .
    ?p wdt:P31/wdt:P279* wd:Q22988603 .
    FILTER NOT EXISTS {
      # Wikidata property for a unique identifier
      ?p wdt:P31/wdt:P279* wd:Q19847637 .
    }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }