Add raw JSON for Captioning task

Move REC raw files into referring_expression/ subfolder

Remove stale pre-rename files (1600-1743)

Remove stale pre-rename files (1200-1600)

Remove stale pre-rename files (800-1200)

Remove stale pre-rename files (400-800)

Remove stale pre-rename files (0-400)

Add raw JSON + bbox images for OCR, Text-Object Grounding, Text-Region Grounding

Add nuscenes config as Parquet with embedded images for the Dataset Viewer

Per-sample bbox images: only the referenced object + text box(es) for each sample

Remove old per-image bbox files (replaced by per-sample bbox images)

Add nuscenes config as Parquet with embedded images for the Dataset Viewer

Add nuScenes source: images, bbox images, and REC annotations