What is the {optical telescope} with the {MAX(focal length)} ?
What telescope has the most focal length?
WHICH IS THE OPTICAL TELESCOPR WITH THE MOST FOCAL LENGTH
SELECT ?j WHERE { ?j rdf:type ontology:optical_telescope . ?j property:focal_length ?w }
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q35273>.
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?ent .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2151>.
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .}
ORDER BY DESC(?obj)
LIMIT 5
select ?ent where { ?ent wdt:P31 wd:Q35273 . ?ent wdt:P2151 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Nordic Optical Telescope VLT Survey Telescope Siding Spring 2.3 m Telescope Grubb 6 Inch Telescope Extremely Large Telescope