About: http://webisa.webdatacommons.org/268654263

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	In some embodiments, a tensioning mechanism, such as but not limited to, a spring force mechanism, a locking mechanism, a frame, etc., may operate to maintain tension on the screen when in the open position.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com