About: http://webisa.webdatacommons.org/358952218

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	Our knowledge of when and where different trees once grew comes mostly from taking core samples of bogs, lakes and other wetlands, and identifying fossil pollen grains at different levels.
http://www.w3.org/ns/prov#wasQuotedFrom	americanforests.org