About: http://webisa.webdatacommons.org/75707359

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	Chalk is derived from sedimentary rock, a form of limestone composed of a mineral, calcite.
http://www.w3.org/ns/prov#wasQuotedFrom	evelynembry.com