 Complete the following phrase:  Pérez, who is classified as a T52 classification wheelchair racer, represented Mexico at the 2012 Summer Paralympics in London competing in the 200, 400 and 800 metres races. He was disqualified in the first round of the 400m event, but came fifth in the 200 metres and won a bronze medal in the 800 metres. As well as Paralympic success, Pérez has won two medals at the IPC Athletics World Championships, both coming in 