About: http://webisa.webdatacommons.org/344743907

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	By the 1980s, enhancements included a resilient pad to cushion the surface, as well as a sand-filled version, still used for tennis, putting greens and other sports.
http://www.w3.org/ns/prov#wasQuotedFrom	sportsbuilders.org