Scene: scene0689_00 (source dataset: scannet)
Grounding level: space_level — Distance Understanding
Referring expression: Install a ceiling fan measuring 0.8 meters in length and width, and 0.2 meters in height directly above the conference table. It should be placed in the center of the room and 1 meter from the tabletop, providing even airflow throughout the room.
Ground-truth 3D box: width 0.8 m, length 0.8 m, height 0.2 m; center (-0.2, 0.2, 1.84); rotation angle 2