What is the {human} for {discoverer or inventor} of {boron}
Who found the boron?
Who discovered the boron?
SELECT DISTINCT ?i WHERE { ?i rdf:type ontology:human . resource:Boron property:discoverer_or_inventor ?i }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q618> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P61> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj . ?obj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q5> } 
 select distinct ?obj where { wd:Q618 wdt:P61 ?obj . ?obj wdt:P31 wd:Q5 } 
Humphry Davy