About: http://webisa.webdatacommons.org/420806677

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	(e) Protective devices. (1) When exposed moving parts such as gears, chains, and chain sprockets present a hazard to employees during crane and derrick operations, those parts shall be securely guarded.
http://www.w3.org/ns/prov#wasQuotedFrom	osha.gov