query-59bb6612f1a9ad2c87f12edc02d01225

gives 134,808 items, while

Use at

https://query.wikidata.org/sparql

PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
SELECT (COUNT(DISTINCT ?item) AS ?count) WHERE {
    ?item wdt:P31/wdt:P279* wd:Q43229; wdt:P749 [].
}

Query found at

https://www.wikidata.org/wiki/Wikidata:Project_chat/Archive/2021/01

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v2("?count") v1("?item"):::projected a2((" ")) a1((" ")) c3(["wd:Q43229"]):::iri v1 --"wdt:P31"--> a1 a1 --"wdt:P279"--> c3 v1 --"wdt:P749"--> a2 bind1[/"count(?item)"/] v1 --o bind1 bind1 --as--o v2