About: http://webisa.webdatacommons.org/174592581

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	Slate is a naturally occurring substance, which can be laid out in a variety of patterns, is naturally fire and pest resistant, and often outlasts the underlying material that supports it.
http://www.w3.org/ns/prov#wasQuotedFrom	permanentroof.com