About: http://webisa.webdatacommons.org/215930399

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	The backing sheet usually comprises a thin film of plastic such as polyethylene, although in some cases it might also comprise other materials, e.g. a nonwoven fabric, which has been suitably treated so as to be liquid impermeable.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com