What is the {aircraft family} with the {MIN(maximum glide ratio)} whose {instance of} is {aircraft family}  ?
What are the aircraft families with the lowest and highest glide ration?
which aircraft family has the lowest highest glide ration whose instance of is aircraft family?
SELECT ?d WHERE { ?d rdf:type ontology:aircraft_family . ?d rdf:type ontology:aircraft_family . ?d property:maximum_glide_ratio ?a }
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q15056993>.

?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/P1470>.
?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/P31> .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q15056993> .

}
ORDER BY ASC(?obj1)
LIMIT 5
select ?ent where { ?ent wdt:P31 wd:Q15056993 . ?ent wdt:P1470 ?obj . ?ent wdt:P31 wd:Q15056993} ORDER BY ASC(?obj)LIMIT 5 
SZD-50 Puchacz Grob G102 Astir Rolladen-Schneider LS4 G104 Speed Astir ASW 20