About: http://webisa.webdatacommons.org/427469080

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	I thought that the shape could be changed from being mostly flat and parallel with the ground to being a sphere and able to roll and slide easily.
http://www.w3.org/ns/prov#wasQuotedFrom	umn.edu