About: http://webisa.webdatacommons.org/50505205

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	It is to be understood that the vacuum cells may be used in various other configurations besides horizontal so that the vacuum units assume orientations other than top and bottom.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com