 Complete the following phrase:  San Marino first entered Olympic competition at the 1960 Summer Olympics in Rome. Excepting the 1964 Tokyo Summer Olympics, they have participated in every edition of the Summer Olympic Games since, making London the nations thirteenth appearance in the quadrennial event. No athlete who has represented San Marino has ever won a medal at the Olympic Games. The London Summer Games were held from 27 July to 12 August 2012. The Sammarinesi delegation consisted of four athletes, archer Emanuele Guidi, sprinter Martina Pretelli, trap shooter Alessandra Perilli and short-distance swimmer Clelia Tini. They were accompanied by a press officer and five officials, including the San Marino State Secretary for Sport, Fabio Berardi, and the President of the Sammarinese National Olympic Committee, Angelo Vicini. The delegation flew to London on 24 July. Perilli was selected as the flag bearer for the 