About: http://webisa.webdatacommons.org/360243559

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	Any type of marker on the reader 210, 215 may be used such as an arrow or other indications including light emitting diodes (LEDs), where arrows 240, 245 are shown in FIG. 2.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com