About: http://webisa.webdatacommons.org/408311327

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	ventilation or other engineering controls to keep worker exposure to airborne
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com