About: http://webisa.webdatacommons.org/206996159

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	Further, FIG. 17 is a graph representing the light-shading amount S_elc as a function of time, which is useful in explaining a conventional pen-up/pen-down determining method.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com