Update README.md

README.md

@@ -132,6 +132,13 @@ Note on data partitions: HuggingFace limits folders to 10,000 files per folder,
 
 **classes.txt**:
   - `0`: zebra
+  - `1`: giraffe
+  - `2`: onager
+  - `3`: dog
+
+Note: only zebras appear in this dataset; other class labels are included to be consistent across MMLA data collected at other locations, 
+see the data from [Mpala Research Center](https://huggingface.co/datasets/imageomics/mmla_mpala) and [The Wilds](https://huggingface.co/datasets/imageomics/mmla_wilds) datasets.
+
 
 **frame_id.txt**:
   - `class`: Class of the object in the image (0 for zebra)