About: http://webisa.webdatacommons.org/434446186

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	Covering ??? Natural surfaces are covered with an impermeable material such as butyl rubber, plastic sheeting, tiles, and metal sheets.
http://www.w3.org/ns/prov#wasQuotedFrom	slideshare.net