What is <time of discovery or invention> of <Sierpinski triangle> ?
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When was the Sierpinski Triangle discovered?
SELECT DISTINCT ?o WHERE { resource:Sierpinski_triangle property:time_of_discovery_or_invention ?o }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q663365> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P575> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer. }
select distinct ?answer where { wd:Q663365 wdt:P575 ?answer}
1915-01-01T00:00:00Z