Trim license explanation; keep license tag + changes-made note

README.md

@@ -31,14 +31,9 @@ The main task of this dataset is the semantic segmentation of the heart in cardi
 
 ## License & Attribution
 
-Released under [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
-(Attribution–NonCommercial–ShareAlike), the same license applied by the original
-ACDC organizers.
-
-- **NonCommercial (NC):** this data may be used for **non-commercial purposes only**.
-- **ShareAlike (SA):** any redistributed copy or derivative must be licensed under
-  the same **CC BY-NC-SA 4.0**.
-- **Attribution (BY):** cite the original creators (see Reference below).
+Released under [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/),
+the same license applied by the original ACDC organizers. Cite the original
+creators (see Reference below).
 
 **Changes made in this mirror:** the original ACDC NIfTI release is re-hosted with
 its native `training/` and `testing/` per-patient layout (each `patientNNN/` folder