Question: What is the lethal dose of ketone?
Paraphrase: Tell me the lethal dose of Ketone
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q221696 . ?ent wdt:P2240 ?obj . ?ent wdt:P31 wd:Q170744 } ORDER BY DESC(?obj)LIMIT 5 
Answer: acetone, acetone, acetone, acetone, acetone