About: http://webisa.webdatacommons.org/239279892

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 general form, the ball is spherical and is composed of suitable flexible materials such as rubber or rubber provided with suitable protective covering, or of translucent rubber.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com