About: http://webisa.webdatacommons.org/38352229

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 sections 22 and 24 are assembled to form a rectangle or other closed shape with an open region in the center of the assembled mat 20.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com