Update README.md

README.md

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 ---
-license: cc-by-4.0
-pretty_name: Raw space-based images from the Hubble Space Telescope 
+license: mit
+pretty_name: Raw space-based images from the Hubble Space Telescope
 tags:
 - astronomy
 - compression
@@ -9,7 +9,7 @@ tags:
 
 # SBI-16-2D Dataset
 
-SBI-16-2D is a dataset which is part of the AstroCompress project. It contains imaging data assembled from the Hubble Space Telescope (HST). <TODO>Describe data format</TODO>
+SBI-16-2D is a dataset which is part of the AstroCompress project. It contains imaging data assembled from the Hubble Space Telescope (HST). Note that the underlying data is released under [CC-4.0](https://creativecommons.org/licenses/by/4.0/deed.en).
 
 # Usage