AN odd-looking ‘tent’ stood at one corner of the National Gallery, Jakarta, last week. It looked like an air mattress; one that inflates when pumped and one usually takes on picnic trips. Unlike most of its kind, however, the red, wavy mattress was not lying flat on the floor. Instead, both the right and left sides were fused together to form a hollow space in the middle where people can lay down. Should it now be called a tent-mattress or wh