SELECT DISTINCT ?uri WHERE { ?uri <http://dbpedia.org/property/mission> <http://dbpedia.org/resource/Apollo_11> . ?uri <http://dbpedia.org/property/mission> <http://dbpedia.org/resource/Gemini_8> . }
Who was in the missions of Apollo 11 and Gemini 8?
SELECT DISTINCT ?a WHERE { ?a property:mission resource:Gemini_8 . . ?a property:mission resource:Apollo_11 }
Neil Armstrong
[Neil Armstrong] was in the missions are Apollo 11 and Gemini 8.
[Neil Armstrong] participated in the Apollo 11 and Gemini 8 missions.