Dataset Error: DaNE contains empty samples at the end
Thanks for reporting, I opened a PR to fix that One the PR is merged the fix will be available in the next release of `datasets`.

If you don't want to wait the next release you can still load the script from the master branch with

```python
load_dataset("dane", script_version="master")
``` If you have other questions feel free to reopen :) 
The dataset DaNE, contains empty samples at the end. It is naturally easy to remove using a filter but should probably not be there, to begin with as it can cause errors.

```python
>>> import datasets
[...]
>>> dataset = datasets.load_dataset("dane")
[...]
>>> dataset["test"][-1]
{'dep_ids': [], 'dep_labels': [], 'lemmas': [], 'morph_tags': [], 'ner_tags': [], 'pos_tags': [], 'sent_id': '', 'text': '', 'tok_ids': [], 'tokens': []}
>>> dataset["train"][-1]
{'dep_ids': [], 'dep_labels': [], 'lemmas': [], 'morph_tags': [], 'ner_tags': [], 'pos_tags': [], 'sent_id': '', 'text': '', 'tok_ids': [], 'tokens': []}
```

Best,
Kenneth