fix download

ipquiz.py

@@ -83,7 +83,7 @@ class IPQuizDataset(datasets.GeneratorBasedBuilder):
             {
                 "language": datasets.Value("string"),
                 "problem": datasets.Value("string"),
-                "candidates": datasets.features.Sequence(
+                "candidates": datasets.Sequence(
                     {
                         "texts": datasets.Value("string"),
                         "options": datasets.Value("string"),
@@ -120,11 +120,11 @@ class IPQuizDataset(datasets.GeneratorBasedBuilder):
         downloaded_files = dl_manager.download(_URLS)
         return [
             datasets.SplitGenerator(
-                name=self.config.name,
+                name=datasets.Split.TRAIN,
                 # These kwargs will be passed to _generate_examples
                 gen_kwargs={
                     "filepath": downloaded_files[self.config.name],
-                    "split": self.config.name
+                    "split": 'train'
                 },
             ),
         ]