Update README.md

README.md

@@ -56,7 +56,7 @@ huggingface-cli download FluidVerse/LIDE --repo-type dataset --local-dir <LOCAL_
 
 # Assembly:
 
-After download, data parts for each file, train.h5 or test.h5, can be assembled into a single HDF5 file using the provided assemble.py script. Use it as follows:
+After download, data parts for each file, train.h5, test.h5, or OOD.h5, can be assembled into a single HDF5 file using the provided assemble.py script. Use it as follows:
 ```bash
 python ./assemble.py --folder_path <FOLDER_PATH> --output_path <OUTPUT_PATH>
 ```