About: http://webisa.webdatacommons.org/118754654

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 cover may have a transparent top made, for example, from a transparent polymeric material such as polycarbonate or polymethyl methacrylate, such that the crystal holder may be viewed.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es