About: http://webisa.webdatacommons.org/232114632

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	For underground cave exploring at Illinois Caverns, a hard hat or helmet is a REQUIREMENT to be issued an exploration permit.
http://www.w3.org/ns/prov#wasQuotedFrom	state.il.us