About: http://webisa.webdatacommons.org/24201131

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	A prism arrangement assures that only those parts of a brush, finger, or other drawing implement which are in direct contact with the liquid film will be seen by a video camera, and hence keyed into the image memory.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es