What is the {human} with the {MIN(time in space)} whose {country of citizenship} is {United States of America}  ?
What American has spent less time in space?
Which American citizen has spent the least amount of time in space?
SELECT ?g WHERE { ?g rdf:type ontology:human . ?g property:country_of_citizenship resource:United_States_of_America . ?g property:time_in_space ?n }
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q5>.

?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?ent .
?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2873>.
?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj1.

?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?ent .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P27> .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q30> .

}
ORDER BY ASC(?obj1)
LIMIT 5
select ?ent where { ?ent wdt:P31 wd:Q5 . ?ent wdt:P2873 ?obj . ?ent wdt:P27 wd:Q30} ORDER BY ASC(?obj)LIMIT 5 
Robert R. Gilruth Joseph Kittinger Roger Bruce Chaffee Robert Henry Lawrence Burt Rutan