参考：
best2009
使用以下命令在 TFDS 中加载此数据集：
ds = tfds.load('huggingface:best2009/best2009')
- 说明：
`best2009` is a Thai word-tokenization dataset from encyclopedia, novels, news and articles by
[NECTEC](https://www.nectec.or.th/) (148,995/2,252 lines of train/test). It was created for
[BEST 2010: Word Tokenization Competition](https://thailang.nectec.or.th/archive/indexa290.html?q=node/10).
The test set answers are not provided publicly.
- 许可：CC-BY-NC-SA 3.0
- 版本：1.0.0
- 拆分：
| 拆分 | 样本 |
|---|---|
'test' |
2252 |
'train' |
148995 |
- 特征：
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"id": null,
"_type": "Sequence"
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"char_type": {
"feature": {
"num_classes": 12,
"names": [
"b_e",
"c",
"d",
"n",
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"p",
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"names_file": null,
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"is_beginning": {
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"names": [
"neg",
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}