About: http://webisa.webdatacommons.org/29792194

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	In some cases such as shown in FIG. 8 the stiffening means or rod may be plastic or metal, bone, wood, ivory or the like and may extend all the way or almost all the way through the length of the tube 22 for use in special circumstances.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com