question: Victoria Azarenka and Marat Safin, have which mutual occupations?
answer: professional tennis player
context: Title: Marat Safin
  Passage: Marat Mubinovich Safin (Russian: Мара́т Муби́нович Са́фин ; ] , Tatar: Марат Мөбин улы Сафин "Marat Möbin uğlı Safin" ; born 27 January 1980) is a Russian politician and retired professional tennis player.  He achieved the Association of Tennis Professionals (ATP) world No. 1 singles ranking on November 20, 2000.  Nobody taller than Safin has ever reached his world number-one ranking.  Safin is the older brother of former world No. 1 WTA player, Dinara Safina.  They are the first and only brother–sister tandem in tennis history who have both achieved No. 1 rankings.  On court, Safin was famous for his emotional outbursts and sometimes fiery temper.
  Title: Boodles Challenge
  Passage: The Boodles Tennis Challenge (former Boodle and Dunthorne Champions Challenge) is an international five-day tennis exhibition held at Stoke Park in Buckinghamshire, England.  In coordination with Boodles, a luxury jeweler, it was initially founded by veteran sports agent Patricio Apey as an event to help players hone their grass court skills in the lead-up to Wimbledon.  It is played in a similar style to the AAMI Classic giving the players at least three matches each and allowing non competition players to appear in one match per a day.  Over recent years Andre Agassi, Pete Sampras, Tim Henman, Marat Safin, James Blake, Andy Roddick, Fernando González, David Nalbandian, Novak Djokovic, Fernando Verdasco, Jo-Wilfried Tsonga and Andy Murray have all appeared.  Since its inception, The Boodles has turned into a lifestyle event featuring British luxury brands such as Boodles, Veuve Clicquot and H.R. Owen.
  Title: 2001 Majorca Open – Singles
  Passage: Marat Safin was the defending champion but did not compete that year.
  Title: Victoria Azarenka
  Passage: Victória Fyódorovna Azárenka (Belarusian: Вікторыя Фёдараўна Азаранка ; Russian: Виктория Фёдоровна Азаренко; born 31 July 1989) is a Belarusian professional tennis player.  She is a former world No. 1.
citations: Marat Safin Victoria Azarenka