Premise: The 2016 Summer Olympics ( Jogos Olímpicos de Verão de 2016 ) , officially known as the Games of the XXXI Olympiad and commonly known as Rio 2016 , was a major international multi-sport event held in Rio de Janeiro , Brazil , from 5 August to 21 August 2016 . With 306 sets of medals , the games featured 28 Olympic sports , including rugby sevens and golf , which were added to the Olympic program in 2009 .
Hypothesis: The 2016 Summer Olympics was a single-sport event.
Label: CONTRADICTION