About: http://webisa.webdatacommons.org/61188557

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 a form of fine-grained limestone but is soft and porous and generally unsuitable for aggregate use.
http://www.w3.org/ns/prov#wasQuotedFrom	oregrinder.com