What is the {Constellation variant} with the {MAX(maximum operating altitude)} whose {manufacturer} is {Lockheed Corporation}  ?
Name the Lockheed-manufactured Constellation variant with the highest operating altitude ?
select ?ent where { ?ent wdt:P31 wd:Q16986328 . ?ent wdt:P2254 ?obj . ?ent wdt:P176 wd:Q7233 } ORDER BY DESC(?obj)LIMIT 5 
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q16986328>.

?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/P2254>.
?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/P176> .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q7233> .

}
ORDER BY DESC(?obj1)
LIMIT 5
What is the name of the Lockheed-manufactured Constellation  variant that has the highest operational altitude?