Question: Name the Class IIIB combustible liquid that is an occupational carcinogen with the lowest melting point.
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q21009059 . ?ent wdt:P2101 ?obj . ?ent wdt:P31 wd:Q21074597. } ORDER BY ASC(?obj)LIMIT 5