What is <investigated by> of <Rafael Correa> ?
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What is Rafael Correa investigated by?
SELECT DISTINCT ?k WHERE { resource:Rafael_Correa_Delgado property:investigated_by ?k }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q19581> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1840> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer. }
select distinct ?answer where { wd:Q19581 wdt:P1840 ?answer}