try more verbose dalaj-ged meta typing

superlim-2.py

@@ -208,8 +208,14 @@ class SuperLim(datasets.GeneratorBasedBuilder):
                 "sentence": datasets.Value("string"),
                 "label": datasets.ClassLabel(num_classes=2, names=['correct', 'incorrect']),
                 "meta": datasets.Features({
-                    'error_span': datasets.Value("string"),
-                    'confusion_pair': datasets.Value("string"),
+                   'error_span': datasets.Features({
+                        'start': datasets.Value(dtype='int64'),
+                        'stop': datasets.Value(dtype='int64')
+                    }),
+                    'confusion_pair': datasets.Features({
+                        'incorrect_span': datasets.Value("string"),
+                        'correction': datasets.Value('string')
+                    }),
                     'error_label': datasets.Value("string"),
                     'education_level': datasets.Value("string"),
                     'l1': datasets.Value("string"),