Update magpie.py

magpie.py

@@ -93,7 +93,7 @@ class Magpie(datasets.GeneratorBasedBuilder):
         features["pos_tags"] = datasets.features.Sequence(datasets.Value("string"))
         return datasets.DatasetInfo(
             description=_DESCRIPTION,
-            features=features,
+            features=datasets.Features(features),
             supervised_keys=None,
             homepage=_HOMEPAGE,
             citation=_CITATION,