Fix DuplicatedKeysError (#2)

- Fix DuplicatedKeysError (9ad52d95a8a8f567345d864cb9005e14a4a8de41)

taskmaster2.py

@@ -115,6 +115,7 @@ class Taskmaster2(datasets.GeneratorBasedBuilder):
         ]
 
     def _generate_examples(self, filepath):
+        key = 0
         with open(filepath, encoding="utf-8") as f:
             dialogs = json.load(f)
             for dialog in dialogs:
@@ -122,4 +123,5 @@ class Taskmaster2(datasets.GeneratorBasedBuilder):
                 for utterance in utterances:
                     if "segments" not in utterance:
                         utterance["segments"] = []
-                yield dialog["conversation_id"], dialog
+                yield key, dialog
+                key += 1