Question: List the significant building of the architect who also designed  Kiev?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { ?x onto:significantBuilding <http://dbpedia.org/resource/Kiev> . ?x onto:significantBuilding ?uri . ?x rdf:type onto:Architect}