PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • as for the others, just look up everyone who has beaten federer. I am sure there are many ...and if there are many, it would indicate that the players of this era can present a decent competetion to federer. and if we believe sampras' and aggassi's assertion that federer is the greatest to have ever played the game then it is only logical to say that in this era there are many players who can presen
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