Claim: In the 2011 World Aquatics Championships, there were preliminaries, semifinals and finals in the individuals events ---the 18 divers with the highest scores in preliminaries proceeded to the semi-finals, and the the top twelve of those went on to finals.
Evidence: Individual events consisted of preliminaries, semifinals and finals. The semifinal consisted of the top 18 ranked divers from the preliminary competition and the final consisted of the top 12 ranked divers from the semifinal.