Scene: scene0030_00 (source dataset: scannet)
Grounding level: object_level — Dimensionality
Referring expression: Find the straighter, thinner blackboard that has a width less than half a meter but spans almost 4 meters in length.
Ground-truth 3D box: width 3.92 m, length 0.19 m, height 1.44 m; center (0.38, 2.99, 1.49); rotation angle 0