About: http://webisa.webdatacommons.org/254318614

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	Looking at pitched roofs, it is more common to see roof tiles made of burnt clay, or shingles made of slate, wood or asphalt (actually a form of roofing felt too).
http://www.w3.org/ns/prov#wasQuotedFrom	informationtopics.com