About: http://webisa.webdatacommons.org/83369405

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	But Martin Verkerk, now 25, considers his backhand also a prime strength, and deems that his best surface is clay and slow hard courts" (quoted from ATP material).
http://www.w3.org/ns/prov#wasQuotedFrom	tennisserver.com