About: http://webisa.webdatacommons.org/448919856

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	Each of the sensors 45a, 45b, and 45c may be any device, such as a microswitch or photocell, which is capable of detecting the presence of one of the articles.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es