About: http://webisa.webdatacommons.org/287257810

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 unprotected part of the upper layer may also be removed by mechanical means such as engraving or sandblasting.
http://www.w3.org/ns/prov#wasQuotedFrom	theglassmuseum.com