Question: What is the birth place of the astronaut whose mission was the Vostok programmer?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { ?x prop:mission <http://dbpedia.org/resource/Vostok_programme> . ?x onto:birthPlace ?uri  . ?x rdf:type onto:Astronaut}