Question: Which billionaire has the highest net worth estimate?
Paraphrase: Which billionaire has the highest net worth?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q1062083 . ?ent wdt:P2218 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: Larry Ellison, Pavel Baudiš, Aliko Dangote, Carl Icahn, Lee Man Tat