About: http://webisa.webdatacommons.org/293650665

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 short, there is no method for checking other than something homemade--like hooking up a light sensor or webcam and pointing it at the monitor's power light :) share|improve this answer answered Aug 5 '14 at 17:16
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com