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The dataset viewer is not available for this split.
Cannot load the dataset split (in streaming mode) to extract the first rows.
Error code:   StreamingRowsError
Exception:    CastError
Message:      Couldn't cast
source_dataset: string
revision: string
model_name: string
languages: list<item: string>
  child 0, item: string
skip_tokens_per_language: int64
kept_tokens_per_language: int64
context_size: int64
total_tokens: int64
language_manifests: list<item: struct<source_dataset: string, revision: string, model_name: string, language: string, sk (... 177 chars omitted)
  child 0, item: struct<source_dataset: string, revision: string, model_name: string, language: string, skip_tokens:  (... 165 chars omitted)
      child 0, source_dataset: string
      child 1, revision: string
      child 2, model_name: string
      child 3, language: string
      child 4, skip_tokens: int64
      child 5, kept_tokens: int64
      child 6, context_size: int64
      child 7, sequences: int64
      child 8, raw_tokens_seen: int64
      child 9, documents_seen: int64
      child 10, documents_contributing: int64
      child 11, parquet_file: string
documents_seen: int64
kept_tokens: int64
raw_tokens_seen: int64
documents_contributing: int64
language: string
parquet_file: string
sequences: int64
skip_tokens: int64
to
{'source_dataset': Value('string'), 'revision': Value('string'), 'model_name': Value('string'), 'language': Value('string'), 'skip_tokens': Value('int64'), 'kept_tokens': Value('int64'), 'context_size': Value('int64'), 'sequences': Value('int64'), 'raw_tokens_seen': Value('int64'), 'documents_seen': Value('int64'), 'documents_contributing': Value('int64'), 'parquet_file': Value('string')}
because column names don't match
Traceback:    Traceback (most recent call last):
                File "/src/services/worker/src/worker/utils.py", line 147, in get_rows_or_raise
                  return get_rows(
                      dataset=dataset,
                  ...<4 lines>...
                      column_names=column_names,
                  )
                File "/src/libs/libcommon/src/libcommon/utils.py", line 272, in decorator
                  return func(*args, **kwargs)
                File "/src/services/worker/src/worker/utils.py", line 127, in get_rows
                  rows_plus_one = list(itertools.islice(safe_iter(ds, dataset=dataset), rows_max_number + 1))
                File "/src/services/worker/src/worker/utils.py", line 478, in safe_iter
                  yield from ds.decode(False) if ds.features else ds
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2818, in __iter__
                  for key, example in ex_iterable:
                                      ^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2355, in __iter__
                  for key, pa_table in self._iter_arrow():
                                       ~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2380, in _iter_arrow
                  for key, pa_table in self.ex_iterable._iter_arrow():
                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 536, in _iter_arrow
                  for key, pa_table in iterator:
                                       ^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 419, in _iter_arrow
                  for key, pa_table in self.generate_tables_fn(**gen_kwags):
                                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 343, in _generate_tables
                  self._cast_table(pa_table, json_field_paths=json_field_paths),
                  ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 132, in _cast_table
                  pa_table = table_cast(pa_table, self.info.features.arrow_schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2369, in table_cast
                  return cast_table_to_schema(table, schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2297, in cast_table_to_schema
                  raise CastError(
                  ...<3 lines>...
                  )
              datasets.table.CastError: Couldn't cast
              source_dataset: string
              revision: string
              model_name: string
              languages: list<item: string>
                child 0, item: string
              skip_tokens_per_language: int64
              kept_tokens_per_language: int64
              context_size: int64
              total_tokens: int64
              language_manifests: list<item: struct<source_dataset: string, revision: string, model_name: string, language: string, sk (... 177 chars omitted)
                child 0, item: struct<source_dataset: string, revision: string, model_name: string, language: string, skip_tokens:  (... 165 chars omitted)
                    child 0, source_dataset: string
                    child 1, revision: string
                    child 2, model_name: string
                    child 3, language: string
                    child 4, skip_tokens: int64
                    child 5, kept_tokens: int64
                    child 6, context_size: int64
                    child 7, sequences: int64
                    child 8, raw_tokens_seen: int64
                    child 9, documents_seen: int64
                    child 10, documents_contributing: int64
                    child 11, parquet_file: string
              documents_seen: int64
              kept_tokens: int64
              raw_tokens_seen: int64
              documents_contributing: int64
              language: string
              parquet_file: string
              sequences: int64
              skip_tokens: int64
              to
              {'source_dataset': Value('string'), 'revision': Value('string'), 'model_name': Value('string'), 'language': Value('string'), 'skip_tokens': Value('int64'), 'kept_tokens': Value('int64'), 'context_size': Value('int64'), 'sequences': Value('int64'), 'raw_tokens_seen': Value('int64'), 'documents_seen': Value('int64'), 'documents_contributing': Value('int64'), 'parquet_file': Value('string')}
              because column names don't match

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FineWeb2 multilingual CLT entropy evaluation data

This dataset contains held-out token sequences used to measure multilingual feature entropy for CausalNLP/multilingual_gpt2-clt-ar-zh-ko-ja.

Construction

  • Source: HuggingFaceFW/fineweb-2
  • Source revision: af9c13333eb981300149d5ca60a8e9d659b276b9
  • Tokenizer: CausalNLP/gpt2-ar-zh-ko-ja-120k
  • Languages/configurations: arb_Arab, cmn_Hani, jpn_Jpan, kor_Hang
  • The first 200,000,000 tokenizer tokens of each language were skipped.
  • The following 1,000,000 tokens per language were retained.
  • Each row contains one complete 16-token sequence.
  • There are 62,500 rows per language and 4,000,000 retained tokens in total.

The Parquet files contain input_ids, language, source_id, and document_token_start. See manifest.json and the per-language manifests for the exact construction parameters and source-stream counts.

This dataset preserves token IDs rather than decoded text so that the entropy evaluation is reproducible with the exact tokenizer used for the CLT.

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