About: http://webisa.webdatacommons.org/378253599

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	On Earth, you can calculate when rocks formed and when they were last modified by comparing the ratios of various elements to the versions they turn into through radioactive decay, or other processes.
http://www.w3.org/ns/prov#wasQuotedFrom	newscientist.com