an Entity references as follows:
The individual dressage at the 1980 Summer Olympics took place on 31 July and 1 August at the Trade Unions' Equestrian Complex. The competition was split into two phases: 1. * Grand Prix (31 July)Riders performed the Grand Prix test. The twelve riders with the highest scores advanced to the final. 2. * Grand Prix Special (1 August)Riders performed the Grand Prix Special test.