Task: Text Categorization
Input (English): Context: Sione Kalamafoni (born 18 May 1988) is a rugby union footballer who plays at number 8. Kalamafoni played for Tonga at the 2011 Rugby World Cup.Kalamafoni first signed to Nottingham in the RFU Championship from the 2010/11 season. On 15 March 2012 Kalamafoni would leave Nottingham to sign for Gloucester Rugby in the Aviva Premiership on a two-year contract from 2012/13 season.
Question: The document can be classified to which topic? 
Options: 1)OfficeHolder, 2)MeanOfTransportation, 3)NaturalPlace, 4)Athlete, 5)Album
Output (English): 4