Polish model card layout

data_sources/DATA_SOURCES.md

@@ -1,8 +1,8 @@
 # Data Sources
 
-This repository does not redistribute raw data. The table below records the
-resources used by the paper, their role in the experiments, and public access
-entry points. Users must obtain each source under its own terms.
+This repository documents source-data access for the resources used by the
+paper. The table below records each resource, its role in the experiments, and
+public access entry points. Users should obtain each source under its own terms.
 
 | Source | Role in paper | Public access entry point |
 |---|---|---|
@@ -19,9 +19,8 @@ entry points. Users must obtain each source under its own terms.
 ## Notes
 
 - The paper places gridded resources on a projected 5 km EPSG:5070 grid.
-- The bundled artifacts contain summary values only. They are not a substitute
-  for the original data.
+- The bundled artifacts contain summary values for release checking.
 - Full raw-data reruns require users to obtain each source independently and to
   construct the intermediate grids/features described in the paper.
-- Access mechanisms and licensing can change. The links above are entry points,
-  not redistributed copies.
+- Access mechanisms and licensing can change. The links above point to the
+  original providers.