Update README.md

README.md

@@ -43,6 +43,7 @@ This Hugging Face repository organizes the data into two levels:
 
 1. **Intermediate Data**: CSV files exported from the initial R/Bioconductor processing step.
 2. **Processed Data**: model-ready train, validation, and test splits generated in Python.
+3. **Processed Data Subset**: subset of the processed rain, validation, and test splits generated in Python. These have a reduced feature space and are for display only.
 
 The prediction task is binary classification of distant metastasis-free survival (DMFS) event status using gene-expression features.
 
@@ -115,4 +116,9 @@ BC/
 │   ├── validation.csv
 │   └── test.csv
 │
+├── processed_data_subset/
+│   ├── train.csv
+│   ├── validation.csv
+│   └── test.csv
+│
 └── README.md