LONDON.- Leading contemporary artist Anri Sala’s exhibition at the Serpentine Gallery is conceived as a cycle, or loop, structured around pairs of works that mirror each other throughout the Gallery’s spaces. Many of the works presented use live performance as their starting point or lead to a performance. Sala will stage the performance 3-2-1, 2011, in which saxophonists Andre Vida and Caroline Kraabel respond live to the artist’s film Long Sorrow in a series of daily performances. Answer Me, 2008, was filmed in the dome of an abandoned surveillance station designed by Buckminster Fuller. The dome’s distinctive echo, triggered in the film by a man playing the drums in the large, empty space, drowns all the dialogue spoken by the female character, with the exception of the words that give the film its title. The snare drum in Answer Me appears in the first room of the exhibition and is activated