<https://www.tennis.com/news/articles/7d149b4b-94cb-4207-a13f-785b3ea0294c>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.tennis.com/news/articles/roger-federer-40-birthday-2001-wimbledon-pete-sampras-retrospective>