About: http://webisa.webdatacommons.org/198601592

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	Early in the 20th century proxies derived from such sources as tree-rings, variation in alpine and northern tree lines and lake sedimentary deposits produced climate indicators reaching much further back into the Holocene.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com