About: http://webisa.webdatacommons.org/131667741

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 puzzle board 56 bottom ply is preferably of plywood, but may also be made of other materials such as masonite board, wood, plastic or other materials so long as it provides sufficient stability and support for the puzzle.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com