Trec Dataset has incorrect labels
Thanks for reporting, @wmpauli. 

Indeed we recently fixed this issue:
- #4801 

The fix will be accessible after our next library release. In the meantime, you can have it by passing `revision="main"` to `load_dataset`.
## Describe the bug
Both coarse and fine labels seem to be out of line.


## Steps to reproduce the bug
```python
from datasets import load_dataset

dataset = "trec"
raw_datasets = load_dataset(dataset)
df = pd.DataFrame(raw_datasets["test"])
df.head()
```

## Expected results
text (string) | coarse_label (class label) | fine_label (class label)
-- | -- | --
How far is it from Denver to Aspen ? | 5  	(NUM) | 40  	(NUM:dist)
What county is Modesto , California in ? | 4  	(LOC) | 32  	(LOC:city)
Who was Galileo ? | 3  	(HUM) | 31  	(HUM:desc)
What is an atom ? | 2  	(DESC) | 24  	(DESC:def)
When did Hawaii become a state ? | 5  	(NUM) | 39  	(NUM:date)

## Actual results
  index | label-coarse  |label-fine                  |                    text
-- |-- | -- | --
0    |         4     |     40     | How far is it from Denver to Aspen ?
1      |       5        |  21  | What county is Modesto , California in ?
2        |     3        |  12        |                 Who was Galileo ?
3         |    0       |    7         |                What is an atom ?
4         |    4       |    8       |   When did Hawaii become a state ?

## Environment info

- `datasets` version: 2.4.0
- Platform: Linux-5.4.0-1086-azure-x86_64-with-glibc2.27
- Python version: 3.9.13
- PyArrow version: 8.0.0
- Pandas version: 1.4.3

