What is the {manned spacecraft} for {astronaut mission} of {Alan Shepard}
Which shuttle Alan Shepard utilized in his space explorer mission?
Which spacecraft Alan Shepard used in his astronaut mission?
SELECT DISTINCT ?x WHERE { ?x rdf:type ontology:manned_spacecraft . resource:Alan_Shepard property:astronaut_mission ?x }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q174979> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P450> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj . ?obj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q7217761> } 
 select distinct ?obj where { wd:Q174979 wdt:P450 ?obj . ?obj wdt:P31 wd:Q7217761 } 
Mercury-Redstone 3