About: http://webisa.webdatacommons.org/314610667

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	Another way will be wear or carry grounding stones such as hematite or even obsidian.
http://www.w3.org/ns/prov#wasQuotedFrom	tech-thing.org