User:HenkvD/sandbox

#added before 2016-10
#Demonstrates "unknown value" handling
SELECT ?human ?humanLabel
WHERE
{
	?human wdt:P21 ?gender
	FILTER isBLANK(?gender) .
	SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
}

Try it!

See source Wikidata query and sources.

d:Wikidata:SPARQL query service/Wikidata Query Help/Result Views