Wikidata SPARQL GND

https://w.wiki/6oWf

SELECT ?id
{
 ?item wdt:P31 wd:Q5.
 ?item wdt:P227 ?id. 
 ?item wikibase:sitelinks ?sl.
 FILTER (?sl >= 1).
}

https://w.wiki/6oWr

SELECT ?id
{
 ?item wdt:P31 wd:Q5.
 ?item wdt:P227 ?id.
 FILTER EXISTS {
  ?article schema:about ?item .
  ?article schema:isPartOf <https://de.wikipedia.org/>
 }
}

https://w.wiki/Rkt

SELECT (COUNT(DISTINCT(?item)) AS ?count_item) (COUNT(DISTINCT(?id)) AS ?count_did) (COUNT(?id) AS ?count_id) 
{
 ?item wdt:P31 wd:Q5.
 ?item wdt:P227 ?id.  
}