Question: Which arch dam has the highest annual energy output?
Paraphrase: What arch damn as the highest annual energy output?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q890545 . ?ent wdt:P4131 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: Xiluodu Dam, Victoria Dam, Bin el Ouidane Dam, Eguzon Dam, Varosa Dam