About: http://webisa.webdatacommons.org/60891168

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	By analyzing data about the appearance of sun spots (which causes fluctuations in the heat from the Sun) and data such as variance in tree rings, scientists can get a fairly accurate measure of approximate temperatures in the past.
http://www.w3.org/ns/prov#wasQuotedFrom	krusekronicle.com