Here are some potential typographical errors found in the documentation of the uploaded dataset file:

```python
{
    "issue": "Typo in the map function documentation", 
    "evidence": "If your function returns a column that already exists, then it overwrites it.",
    "description": "The word 'then' is used incorrectly. It should be 'than'. The correct sentence should be: 'If your function returns a column that already exists, than it overwrites it.'."
},
{
    "issue": "Typo in the cast function documentation", 
    "evidence": "For non-trivial conversion, e.g. `string` <-> `ClassLabel` you should use [`map`] to update the Dataset.",
    "description": "The phrase 'non-trivial' is a bit ambiguous. A better phrase could be 'complex'. The correct sentence should be: 'For complex conversions, e.g., `string` <-> `ClassLabel`, you should use [`map`] to update the Dataset.'."
},
{
    "issue": "Typo in the cast function example section", 
    "evidence": ">>> new_features[\'text\'] = Value(\'large_string\')",
    "description": "The term 'large_string' could be confusing. It should be 'long_string' for better clarity. The correct sentence should be: '>>> new_features[\'text\'] = Value(\'long_string\')'."
}
```