Error loading ms_marco v2.1 using load_dataset()
There was a similar issue in #294 
Clearing the cache and download again the dataset did the job. Could you try to clear your cache and download the dataset again ? I was able to load the dataset successfully, I'm pretty sure it's just a cache issue that you have.
Let me know if clearing your cache fixes the problem Yes, it indeed was a cache issue!
Thanks for reaching out!!
Code:
`dataset = load_dataset('ms_marco', 'v2.1')`

Error:
```
`---------------------------------------------------------------------------
JSONDecodeError                           Traceback (most recent call last)
<ipython-input-16-34378c057212> in <module>()
      9 
     10 # Downloading and loading a dataset
---> 11 dataset = load_dataset('ms_marco', 'v2.1')

10 frames
/usr/lib/python3.6/json/decoder.py in raw_decode(self, s, idx)
    353         """
    354         try:
--> 355             obj, end = self.scan_once(s, idx)
    356         except StopIteration as err:
    357             raise JSONDecodeError("Expecting value", s, err.value) from None

JSONDecodeError: Unterminated string starting at: line 1 column 388988661 (char 388988660)
`
```