By Thom Andersen “Films have no interest unless one finds something that burns somewhere within the shot.”—Jean-Marie Straub, Cahiers du Cinéma, October 1984, p. 34 Wang Bing’s Three Sisters (2012) tells a simple story. Three sisters, aged four, six, and ten, live like orphans in Yunnan province, in the village of Xiyangtang (elevation: 3,500 feet;…