Some datasets miss dataset_infos.json or dummy_data.zip
Thanks for reporting.
We should indeed add all the missing dummy_data.zip and also the dataset_infos.json at least for lm1b, reclor and wikihow.

For c4 I haven't tested the script and I think we'll require some optimizations regarding beam datasets before processing it.
 Closing since the dummy data generation is deprecated now (and the issue with missing metadata seems to be addressed).
While working on dataset REAME generation script at https://github.com/madlag/datasets_readme_generator , I noticed that some datasets miss a dataset_infos.json : 

```
c4
lm1b
reclor
wikihow
```

And some does not have a dummy_data.zip : 

```
kor_nli
math_dataset
mlqa
ms_marco
newsgroup
qa4mre
qangaroo
reddit_tifu
super_glue
trivia_qa
web_of_science
wmt14
wmt15
wmt16
wmt17
wmt18
wmt19
xtreme
```

But it seems that some of those last do have a "dummy" directory .

