About: http://webisa.webdatacommons.org/163981470

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	FIG. 4 is a graph for showing the relation between the detection distance from the apparatus to an object and the output signal level from the light receiving device in proportion to the detection distance about the apparatus of FIG. 3;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com