About: http://webisa.webdatacommons.org/424568340

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	Wednesday, June 27, 2007Ice GiantsThe Earth, Mercury, Venus, and Mars are known as the rocky planets because they are composed predominantly of rocks which contain silicon, iron, and other heavy elements.
http://www.w3.org/ns/prov#wasQuotedFrom	harvard.edu