Question: Binary Star with maximum luminosity is?
Paraphrase: Which binary star has the highest luminosity score?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q50053 . ?ent wdt:P2060 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: HD 135591, Deneb, Phi Cassiopeiae, Meissa, Alnitak