What is the {reservoir} with the {MAX(volume as quantity)} ?
what is the reservoir with the largest volume of water?
Which reservoir has the largest volume?
SELECT ?i WHERE { ?i property:volume_as_quantity ?v . ?i rdf:type ontology:reservoir }
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q131681>.
?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/P2234>.
?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:Q131681 . ?ent wdt:P2234 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Kielder Water Kielder Water Överuman Storavan Stora Lulevatten