Update dataset_dict.json

dataset_dict.json

@@ -1 +1,17 @@
-{"splits": ["train", "validation", "test"]}
+{
+  "train": {
+    "num_examples": 30400,
+    "num_bytes": 17722353,
+    "description": "The training set contains 30,400 examples of TripAdvisor reviews with corresponding sentiment labels (1 to 5)."
+  },
+  "validation": {
+    "num_examples": 1600,
+    "num_bytes": 971635,
+    "description": "The validation set contains 1,600 examples used for model tuning."
+  },
+  "test": {
+    "num_examples": 8000,
+    "num_bytes": 4690503,
+    "description": "The test set contains 8,000 examples for final model evaluation."
+  }
+}