Scene: scene0050_00 (source dataset: scannet)
Grounding level: space_level — Trajectory Understanding
Referring expression: Assume you are sitting at the center of a piano bench while playing the piano. Stand up, turn left, walk forward 2.5 meters, then turn right and walk forward another 0.5 meters. At the spot where you stop, place a floor lamp with a base diameter of 0.4 meters and a height of 1.5 meters.
Ground-truth 3D box: width 0.4 m, length 0.4 m, height 1.5 m; center (1.16, -2.1, 0.78); rotation angle 0