Question: What is the short-term exposure limit of chloroform over a 60-minute period?
Paraphrase: In a 60 minute time frame, what is chloroform's short-term exposure limit?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q172275 p:P2407 ?s . ?s ps:P2407 ?obj . ?s pq:P2047 ?x filter(contains(?x , '60.0')) }