About: http://webisa.webdatacommons.org/226868496

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	Simplistically, some chemical elements, such as iron, have become concentrated in the core, while others dominate above the surface, such as nitrogen.
http://www.w3.org/ns/prov#wasQuotedFrom	phys.org