Question: Which airline has the highest total revenue?
Paraphrase: What airline has the highest total revenue?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q46970 . ?ent wdt:P2139 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: Aeroflot, Air China, S7 Airlines, Emirates, Ural Airlines