About: http://webisa.webdatacommons.org/98491130

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 buttons or other activating mechanisms (not shown in FIG. 1) may be pressed to indicate actions to the computer system.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk