About: http://webisa.webdatacommons.org/393420932

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	Tennis Trainers can use this device to observe whether beginner or intermediate players are striking the ball at the optimal spot of their rackets and then to correct the players' racket swing behaviors accordingly.
http://www.w3.org/ns/prov#wasQuotedFrom	udel.edu