About: http://webisa.webdatacommons.org/409101162

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	The value for each grain is either a constant if the parameter is a number or is determined by the value of the envelope at the point in time where the grain starts.
http://www.w3.org/ns/prov#wasQuotedFrom	stanford.edu