data
  ├── nuscenes
  │   ├── can_bus
  │   ├── lidarseg
  │   ├── maps
  │   ├── occ3d.   <------------------------------ where do I find this?
  │   ├── samples
  │   ├── sweeps
  │   ├── v1.0-mini
  │   └── v1.0-trainval
  ├── nuscenes_map_aux_12Hz_interp
  │   └── val_200x200_12Hz_interp.h5
  ├── nuscenes_mmdet3d-12Hz
  │   ├── nuscenes_interp_12Hz_dbinfos_train.pkl
  │   ├── nuscenes_interp_12Hz_infos_track2_eval.pkl
  │   ├── nuscenes_interp_12Hz_infos_train.pkl
  │   └── nuscenes_interp_12Hz_infos_val.pkl
  ├── nuscenes_mmdet3d-12Hz_description
  │   ├── nuscenes_interp_12Hz_updated_description_train.pkl
  │   └── nuscenes_interp_12Hz_updated_description_val.pkl
  ├── nuscenes_mmdet3d_2
  │   └── nuscenes_infos_temporal_val_3keyframes.pkl
  └── nuscenes_track
      ├── ada_track_infos_train.pkl
      └── ada_track_infos_val.pkl