What is <discoverer or inventor> of <Lee de Forest> ?
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Which  is discoverer or inventor of Lee de Forest ?
SELECT DISTINCT ?g WHERE { ?g property:discoverer_or_inventor resource:Lee_de_Forest }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject>  ?answer. ?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> <http://wikidata.dbpedia.org/resource/Q354863>. }
select distinct ?answer where { ?answer wdt:P61 wd:Q354863}
triode Phonofilm Sound-picture Photography