About: http://webisa.webdatacommons.org/420014129

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	In one method, river rocks are collected from a source (e.g., river or supplier), sorted for size and color, engraved with logo or other content, packaged...
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com