Question: Which  NASA astronaut was on mission Gemini 8?
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 {?uri prop:type <http://dbpedia.org/resource/NASA> . ?uri prop:mission <http://dbpedia.org/resource/Gemini_8> . ?uri rdf:type onto:Astronaut}