About: http://webisa.webdatacommons.org/396861417

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 indentations 30 may form the same pattern in the exercise surface as the ridges 14 shown in FIG. 1, or other patterns may be employed, so long as a sufficient sized traction surface is provided by the indentations 30.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com