About: http://webisa.webdatacommons.org/74463158

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	Optionally but preferably, there is a cushion covering 157 affixed to the upper surface of the platform 102 in the recess 102E. The cushion covering 156 may be formed of a material such as closed-cell foam.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com