About: http://webisa.webdatacommons.org/34491281

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	When measuring wood or other material, if the surface or material to be measured does not have a right angle for the end hook to securely attach to, it is difficult to achieve an accurate measurement.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com