About: http://webisa.webdatacommons.org/19246660

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	To overcome such disadvantages, an additional wheel assembly or wheel structure has been incorporated in skates, skateboards and other mobile platforms wherein one or all of the wheels include a spherical configuration.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk