| # Annotation format — `proact-studio-v3` |
|
|
| All fifteen released files share exactly one shape. There are no task-specific or |
| track-specific keys: if a field exists in one file it exists in all of them, with |
| the same type. A loader written against one file reads all of them. |
|
|
| The only difference between splits is **which fields carry values**: |
|
|
| | Field | `*_dev` | `*_test` | |
| |---|---|---| |
| | `videos.*.samples` | the segment annotations | `{}` | |
| | `clips.*.sample_ids` | present | **absent** | |
| | `qa_items.*.answer_choices` | present, with `letter` | present, with `letter` | |
| | `qa_items.*.answer` / `correct_letter` | present | **absent** | |
| | `canary` | present (dev only) | absent | |
|
|
| ## Top level |
|
|
| ```jsonc |
| { |
| "schema_version": "proact-studio-v3", |
| "task": "state_tracking", // "information_capture" | "state_tracking" | "location_tracking" |
| "kind": "canonical", |
| "rev": 0, |
| "split": "test", // "test" | "dev" |
| "ground_truth_released": false, |
| "videos": { … }, // the annotations, indexed by source video |
| "clips": { … } // the evaluation units, indexed by clip |
| } |
| ``` |
|
|
| **Check `ground_truth_released` before you score anything.** On the test split it |
| is `false`, `videos.*.samples` is `{}`, and `sample_ids` is absent — by design. A |
| loader that iterates the samples tree without checking will report zero segments |
| and score every model at 0.0 without erroring. |
|
|
| The `task` field and the paper's short labels correspond as |
| **`information_capture` → IC**, **`state_tracking` → ST**, |
| **`location_tracking` → LT**. |
| |
| ## `videos.<video_uid>` |
| |
| ```jsonc |
| { |
| "video_uid": "3dd00666-a34d-4b45-bb4c-7a4c2342e475", |
| "video_path": null, // always null; video is not distributed |
| "samples": { … } // {} on the test split |
| } |
| ``` |
| |
| `video_uid` is the **upstream** id: an Ego4D video UID, a FineBio id such as |
| `P01_01_02`, or a BioVL-QR name such as `purifydna_1`. |
|
|
| ## `videos.<video_uid>.samples.<sample_id>` — a segment |
|
|
| One annotated thing-worth-speaking-about, in one video. **Dev only.** |
|
|
| ```jsonc |
| { |
| "sample_id": "proact_st_3b538dd6-a02d-5500-8b41-cdf5ec005677", |
| "task": "state_tracking", |
| "object": "kettle", |
| "note": "unattended: yes", |
| "times": { "start_sec": 23.569444, "end_sec": null }, |
| "clip": { "clip_uid": "proact_clip_…", |
| "local_start_sec": 23.569444, |
| "local_end_sec": null } |
| } |
| ``` |
|
|
| | Field | Meaning | |
| |---|---| |
| | `object` | the ground-truth object identity. This is the string the LLM judge compares a model's free-text mention against. There is no ground-truth *message* text. | |
| | `note` | free-text annotator note. Task-dependent and **not** part of the scored reference — e.g. ST uses it for `unattended: yes/no`. | |
| | `times` | **source-video** seconds. | |
| | `clip.local_*` | the same instants relative to `clips[clip_uid].abs_start_sec`. | |
|
|
| ### `end_sec: null` is an open interval, not missing data |
| |
| The state or location was still current when the clip ended. The segment is |
| genuinely open, and the intended reading is "still true at the clip boundary". |
| |
| There are **318** open segments in the Daily track and **159** in Science; Science |
| LT alone is 144 of 371. A loader that treats `null` as a parse error, or that drops |
| such segments, discards a large fraction of the ground truth. |
| |
| The scoring rule is in `eval_config.json`: clamp the end to |
| `clips[clip_uid].duration_sec`, then drop the segment if `end <= start`. |
|
|
| Whenever `times.end_sec` is `null`, `clip.local_end_sec` is `null` too. |
|
|
| ## `clips.<clip_uid>` — an evaluation unit |
|
|
| A clip is what a model is actually shown. Models are evaluated per clip, never on |
| a whole source video. |
|
|
| ```jsonc |
| { |
| "clip_uid": "proact_clip_618ac742-847f-51da-9275-6a551bde597c", |
| "video_uid": "3dd00666-a34d-4b45-bb4c-7a4c2342e475", |
| "clip_path": null, // always null; video is not distributed |
| "abs_start_sec": 793.413382, // cut window in the SOURCE video |
| "abs_end_sec": 973.413382, |
| "duration_sec": 180.0, |
| "sample_ids": [ "proact_vc_…", … ], // ABSENT on the test split |
| "qa_items": { … } |
| } |
| ``` |
|
|
| To reconstruct the clip, cut the source video from `abs_start_sec` to |
| `abs_end_sec`. The clip-local times on every sample are then correct with no |
| further offset. |
|
|
| `duration_sec` is present and non-null on all 400 clips, in every split. It is |
| load-bearing: open segments are resolved against it, so a missing duration |
| silently deletes them. |
|
|
| ### Why `sample_ids` is withheld on test |
| |
| Its **length** is the number of events to report in that clip, and an empty list |
| identifies a **declared negative** — a clip where nothing is worth speaking about, |
| the correct output is silence, and any prediction is a false positive. Both are |
| answers, so neither ships. On dev, `sample_ids` is present and every id resolves |
| in `videos.*.samples`. |
|
|
| ## `clips.<clip_uid>.qa_items.<qa_id>` — the memory probe |
| |
| ```jsonc |
| { |
| "qa_id": "proact_qa_00bb8716-48f2-43a4-979b-0842ae465bdb", |
| "question": "What warning was written on the floor sign I saw?", |
| "answer_choices": [ |
| { "letter": "A", "text": "Watch Your Step" }, |
| { "letter": "B", "text": "Caution Wet Floor" }, |
| { "letter": "C", "text": "Cleaning in Progress" }, |
| { "letter": "D", "text": "Caution Wet Paint" } |
| ], |
| |
| // dev only: |
| "answer": "Caution Wet Floor", |
| "correct_letter": "B", |
| "notes": "" |
| } |
| ``` |
| |
| Every QA item in both tracks is 4-way multiple choice — all 1,500 of them. |
| |
| ### Present the choices in the order given. Do not reorder them. |
| |
| The released order **is** the scored order: the `letter` in each choice is the |
| letter the scorer expects. Correct answers are spread evenly over `A`/`B`/`C`/`D`. |
| |
| - **Read `letter`; never recompute it.** |
| - **Submit letters, not choice text.** A submission is `qa_id → letter`. |
| |
| `answer` is the correct option's text, duplicated for convenience. `notes` is an |
| annotator field, usually empty, and is not scored. |
| |
| Five clips have empty `qa_items` (four Daily, one Science). |
| |
| ## Worked example — load and iterate |
| |
| ```python |
| import json |
|
|
| gt = json.load(open("json/main_dev/state_tracking.json")) |
| assert gt["ground_truth_released"], "test split carries no annotations" |
|
|
| # index samples by id, since they live under their video |
| samples = {sid: s |
| for v in gt["videos"].values() |
| for sid, s in v["samples"].items()} |
| |
| for clip_uid, clip in gt["clips"].items(): |
| segments = [samples[sid] for sid in clip["sample_ids"]] |
|
|
| if not segments: |
| pass # declared negative: the model should stay silent |
| |
| for s in segments: |
| start = s["clip"]["local_start_sec"] |
| end = s["clip"]["local_end_sec"] |
| if end is None: |
| end = clip["duration_sec"] # open interval -> clip boundary |
| if end <= start: |
| continue # zero-length; the matcher drops these |
| # s["object"] is the reference the judge scores a mention against |
| |
| for qa in clip["qa_items"].values(): |
| prompt = "\n".join(f'{c["letter"]}. {c["text"]}' for c in qa["answer_choices"]) |
| gold = qa["correct_letter"] # dev only |
| ``` |
| |
| On the test split, drop the segment half of that loop and keep the QA half |
| without `gold`. |
|
|
| ## What is deliberately absent |
|
|
| Construction metadata was removed before release and is not recoverable from |
| these files: annotator accounts and per-edit history, review and acceptance |
| blocks, free-text object descriptions, generated proactive message templates, and |
| the QA provenance layer. 5,628 personal identifiers were removed; zero remain. |
|
|
| This means the released files record **what the ground truth is**, not **who |
| produced it or when**. If you need inter-annotator agreement figures, they are |
| reported in the paper rather than derivable from this release. |
|
|
