About: http://webisa.webdatacommons.org/442526437

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	According to the NRCA, the final layer of material to finish the roof can include materials such as gravel, mineral granules, and even glass-fiber.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com