Move to TRAIN split to fix ValueError

unsplash25k-image-embeddings.py

@@ -72,7 +72,7 @@ class Unsplash25kImageEmbeddingsDataset(datasets.GeneratorBasedBuilder):
         image_ids_path = dl_manager.download(_URLS["image_ids"])
         return [
             datasets.SplitGenerator(
-                name=datasets.Split.ALL,
+                name=datasets.Split.TRAIN,
                 gen_kwargs={
                     "embeddings_path": embeddings_path,
                     "image_ids_path": image_ids_path