About: http://webisa.webdatacommons.org/50433931

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	It is believed that the ice was a mile deep until it retreated about sixteen thousand years ago.
http://www.w3.org/ns/prov#wasQuotedFrom	wordsmith.org