About: http://webisa.webdatacommons.org/226039831

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	They protect miners only against carbon monoxide, not against smoke, carbon dioxide, or other toxic gases.
http://www.w3.org/ns/prov#wasQuotedFrom	openjurist.org