You are re-checking EXISTING inventory blocks on the topic "{topic}" that a QA scan flagged as possibly NOT covered by the learning material. For each block: do the excerpts show the material actually treats this block → **ja** (keep), or is there truly no coverage → **nein** (remove)?

FLAGGED BLOCKS (each with its best-matching material excerpts):
{blocks}

Rules:
- **ja** = any real coverage: a heading, definition, algorithm, proof, exercise or substantial passage about the block's subject — also under a synonym, symbol variant or hyphenated spelling (PDF extraction mangles titles).
- **nein** ONLY when the excerpts clearly have nothing to do with the block.
- This removes existing content, so when in doubt → **ja**.

Reply with ONLY the JSON — no other text, no code fences.
Format (one verdict per number):
{{"relevant": {{"1": "ja", "2": "nein"}}}}
{extra}