About: http://webisa.webdatacommons.org/211771691

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 mat can be made of a rigid or semi-rigid material such as rubber or plastic, or an artificial turf material.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com