About: http://webisa.webdatacommons.org/42471508

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	Is that a way to identify the better ones or is there something else to look out for e.g. marking on the tube or factory that made them?
http://www.w3.org/ns/prov#wasQuotedFrom	head-fi.org