About: http://webisa.webdatacommons.org/13329608

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 doubt if players, especially juniors, are truly aware of the ball change rule during a match and exactly when the balls should be changed.
http://www.w3.org/ns/prov#wasQuotedFrom	murraysworld.com