About: http://webisa.webdatacommons.org/385531789

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	This means that a lighter element, such as sulfur, must have alloyed with the iron in the core to lower the melting temperature and hence prevent it from solidifying.
http://www.w3.org/ns/prov#wasQuotedFrom	physicsworld.com