query-caf53ff687d78f6d203e541c71636f2c

child (P40),  instance of (P31): PropertiesAn equivalent query (slightly more verbose):

Use at

https://query.wikidata.org/sparql

PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wdno: <http://www.wikidata.org/prop/novalue/>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX p: <http://www.wikidata.org/prop/>
PREFIX bd: <http://www.bigdata.com/rdf#>
SELECT ?human ?humanLabel 
WHERE
{
  ?human wdt:P31 wd:Q5 .         #find humans
  ?human p:P40 ?childStatement . #with at least one P40 (child) statement
  ?childStatement rdf:type wdno:P40 .   #where the P40 (child) statement is defined to be "no value"
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en" . }
}

Query found at

https://www.wikidata.org/wiki/User:Duesentrieb/WDQL

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v2("?childStatement") v1("?human"):::projected c7(["bd:serviceParam"]):::iri c2(["wd:Q5"]):::iri c9(["#91;AUTO_LANGUAGE#93;,en"]):::literal c5(["p:novalue/P40"]):::iri v1 --"p:direct/P31"--> c2 v1 --"p:P40"--> v2 v2 --"a"--> c5 subgraph s1["http://wikiba.se/ontology#label"] style s1 stroke-width:4px; c7 --"wikibase:language"--> c9 end