About: http://webisa.webdatacommons.org/186596145

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	outer layer 29, and is of such thickness as to finish flush with the upper surface of the lower simulated tiles to effect the appearance of overlapping tiles.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com