Update README.md

README.md

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 ---
-license: apache-2.0
 task_categories:
 - text-generation
 - question-answering
@@ -231,6 +230,21 @@ Therefore, while SHP does reflect collective human preferences, models trained o
 Thanks to Greg Stoddard for pointing this out.
 
 
+## License
+
+Last updated: 03/01/2023
+
+This dataset was made by scraping Reddit in accordance with the [Reddit API Terms of Use](https://docs.google.com/a/reddit.com/forms/d/e/1FAIpQLSezNdDNK1-P8mspSbmtC2r86Ee9ZRbC66u929cG2GX0T9UMyw/viewform), without any direct communication or written agreements with Reddit.
+According to the Terms of Use, "User Content" is owned by the users themselves -- not by Reddit -- and Reddit grants a "non-exclusive, non-transferable, non-sublicensable, and revocable license to copy and display the User Content".
+
+Datasets made by scraping Reddit are widely used in the research community: for example, Facebook AI Research used data scraped from Reddit to make the [ELI5](https://huggingface.co/datasets/eli5#source-data) dataset in 2019, which was made available without a license.
+Anthropic AI has also [attested to scraping Reddit for preferences using a different methodology](https://arxiv.org/pdf/2112.00861.pdf), though this data was not made public.
+The [PushShift Reddit dataset](https://arxiv.org/abs/2001.08435), which makes entire dumps of Reddit available on a regular schedule, is also made available without a license (to our knowledge).
+
+We take no responsibility for and we do not expressly or implicitly endorse any downstream use of this dataset.
+We reserve the right to modify the SHP dataset and this license at any point the future.
+
+
 ## Contact
 
 Please contact kawin@stanford.edu if you have any questions about the data.