Several agents have classified the subblocks of the topic "{topic}" by learning-path position. On some they disagree. Decide the final level for each disputed subblock.

DISPUTED SUBBLOCKS (with the votes cast):
{disputed}

Level = learning-path position (WHEN you need the point), NOT difficulty:
- **beginner**: foundation — what you need first/at all; a prerequisite for the rest. Even if conceptually demanding.
- **advanced**: builds on it; common variants, typical application.
- **expert**: subtleties, special cases, niches, rare details — even if substantively simple (e.g. an obscure flag, a version detail).

Rules:
- A simple niche detail is `expert`; a fundamental complex concept is `beginner`.
- Weigh the votes, decide on the merits by learning-path position.
- **`advanced` is not a fallback choice.** Don't pick the middle because the votes are scattered — decide by the criterion "when do you need this?". Hit `beginner`/`expert` clearly where they apply.
- Exactly one level for EACH disputed number.

Reply with ONLY the JSON — no other text, no code fences.

Format (no other text):
{{"levels": {{"1": "beginner", "4": "expert"}}}}
{extra}