About: http://webisa.webdatacommons.org/128230131

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	A mineral is just one substance, while a rock is a mixture of two or more minerals.Look at the rocks and determine how many different minerals are in them.
http://www.w3.org/ns/prov#wasQuotedFrom	coaleducation.org