---
dataset_info:
  - config_name: nld_Latn
    features:
      - name: text
        dtype: string
      - name: id
        dtype: string
      - name: url
        dtype: string
      - name: dump
        dtype: string
      - name: date
        dtype: string
      - name: language
        dtype: string
      - name: language_score
        dtype: float64
license: odc-by
task_categories:
  - text-generation
language:
  - nld
tags:
  - fineweb
  - autocurate
  - autoresearch
---

# fineweb-2-autocurate

Autonomously curated subsets of [HuggingFaceFW/fineweb-2](https://huggingface.co/datasets/HuggingFaceFW/fineweb-2).

An AI agent (Qwen3.5-35B-A3B) iteratively analyzed random samples of web documents,
identified quality problems, and proposed heuristic fixes (regex, string operations).
Each fix was validated by training a small language model and measuring BPB improvement
on a Wikipedia eval set. Only fixes that improved BPB were kept.

## Subsets

| Language | Original docs | Kept docs | Kept % |
|---|---|---|---|
| nld_Latn | 12,016,000 | 10,503,936 | 87.4% |
| ces_Latn | 12,026,000 | 6,223,264 | 51.7% |
| pol_Latn | 12,766,000 | 8,745,444 | 68.5% |