About: http://webisa.webdatacommons.org/78076686

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	Roofing materials, such as roofing shingles, are made from a wide variety of materials, including metal, slate, concrete, plastic, asphalt, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com