Question: Name the chemical substance with the lowest flash point ?
Paraphrase: What chemical substance has the lowest flash point?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q79529 . ?ent wdt:P2128 ?obj . ?ent wdt:P31 wd:Q79529. } ORDER BY ASC(?obj)LIMIT 5 
Answer: petroleum ether, petroleum ether, turpentine, Demeton, Pyrethrum