What is the {proposed aircraft} with the {MAX(wingspan)} whose {undercarriage} is {conventional landing gear}  ?
Which aircraft has the longest wingspan with conventional landing gear?
select ?ent where { ?ent wdt:P31 wd:Q15061018 . ?ent wdt:P2050 ?obj . ?ent wdt:P1637 wd:Q2874355 } ORDER BY DESC(?obj)LIMIT 5 
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q15061018>.

?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/P2050>.
?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/P1637> .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q2874355> .

}
ORDER BY DESC(?obj1)
LIMIT 5
Which aircraft has the longest wingspan with traditional landing gear?