About: http://webisa.webdatacommons.org/11575602

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	Typically, vacuum chamber 50 may be comprised of optically transparent materials, such as plastics or the like, in which case anything inside of chamber 50 would continue to be visible.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com