About: http://webisa.webdatacommons.org/122896865

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	A plastic material could be used, but preferably cardboard is the most desirable material because it is inexpensive and can be easily cut into the desired shape as illustrated in FIG. 3.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com