About: http://webisa.webdatacommons.org/276721551

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	The form and material of the layer of contrasting material are not particularly limited, and the layer typically only need be used when optical methods are used to count the number of scratches.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com