About: http://webisa.webdatacommons.org/247095149

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	Gypsum is a naturally occurring mineral, and millions of tons of it are mined each year; CertainTeed Corp. alone has six mines in North America.
http://www.w3.org/ns/prov#wasQuotedFrom	architectmagazine.com