Updated readme

README.md

@@ -1,12 +1,16 @@
 This is the processed version of [Google's C4 dataset](https://www.tensorflow.org/datasets/catalog/c4).
 
-We prepared three variants of the data: `en`, `en.noclean`, and `realnewslike`. There is a fourth one, `webtextlike`, which was not ready as I am writing this, but we are working on it. If you are interested in the `multilingual` version, please get in touch.
+We prepared five variants of the data: `en`, `en.noclean`, `en.noblocklist`, `realnewslike`, and `multilingual`.
 
 For reference, these are the sizes of the variants:
 
-- `en`: 300GB
+- `en`: 305GB
 - `en.noclean`: 2.3TB
+- `en.noblocklist`: 380GB
 - `realnewslike`: 15GB
+- `multilingual`: 9.7TB
+
+The `en.noblocklist` variant is exactly the same as the `en` variant, except we turned off the so-called "badwords filter", which removes all documents that contain words from the lists at https://github.com/LDNOOBW/List-of-Dirty-Naughty-Obscene-and-Otherwise-Bad-Words.
 
 # How do I download this?
 
@@ -16,17 +20,24 @@ Unfortunately we ran out of time making this into a proper Huggingface dataset,
 git clone https://huggingface.co/datasets/allenai/c4
 ```
 
-If you want only one of the variants, you need some more commands:
+This will download 13TB to your local drive. If you want to be more precise with what you are downloading, follow these commands instead:
 
 ```bash
-git clone -n https://huggingface.co/datasets/allenai/c4
+GIT_LFS_SKIP_SMUDGE=1 git clone https://huggingface.co/datasets/allenai/c4
 cd c4
-git sparse-checkout init --cone
-git sparse-checkout set en
+git lfs pull --include "en/*"
 ```
 
-You can use `git sparse-checkout set` multiple times to select multiple datasets.
+The `git clone` command in this variant will download a bunch of stub files that Git LFS uses, so you can see all the filenames that exist that way. You can then convert the stubs into their real files with `git lfs pull --include "..."`. For example, if you wanted all the Dutch documents from the multilingual set, you would run
+
+```bash
+git lfs pull --include "multilingual/c4-nl.*.json.gz"
+```
 
 # Acknowledgements
 
 Big ups to the good folks at [Common Crawl](https://commoncrawl.org) whose data made this possible ([consider donating](http://commoncrawl.org/donate/)!), to Google for creating the code that curates and filters the data, and to Huggingface, who had no issue with hosting these 3TB of data for public download!
+
+### License
+
+We are releasing this dataset under the terms of [ODC-BY](https://opendatacommons.org/licenses/by/1-0/). By using this, you are also bound by the [Common Crawl terms of use](https://commoncrawl.org/terms-of-use/) in respect of the content contained in the dataset.