Add the dataset number of classes

vqa-lxmert.py

@@ -81,7 +81,7 @@ class VqaV2Lxmert(datasets.GeneratorBasedBuilder):
                 "answer_type": datasets.Value("string"),
                 "label": datasets.Sequence(
                     {
-                        "ids": datasets.Value("int32"),
+                        "ids": datasets.ClassLabel(num_classes=3129),
                         "weights": datasets.Value("float32"),
                     }
                 ),