About: http://webisa.webdatacommons.org/293121282

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	Preferably, the rolls are made of a highly frictional material such as rubber and have a rough surface.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com