About: http://webisa.webdatacommons.org/455828540

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	For example, an optical switch can take the form of a light source, such as a light emitting diode (???LED???), and a light sensor opposed to the light source across the card guide 62.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au