Q&A on why seats at Olympic venues are empty

Criticism has erupted as seats at the Olympic Games have been left empty and athletes have performed in front of less than capacity crowds from the first day of competition.
Eight per cent of tickets have been made available to sponsors and 75% per cent to the public. Another 12% go to National Olympic Committees and 5% to the Olympic family - people like IOC officials and the media.


http://www.bbc.co.uk/news/uk-19037625