bugfix: duplicate Key when loading combined

mr-tydi.py

@@ -132,11 +132,13 @@ class MrTyDi(datasets.GeneratorBasedBuilder):
         return splits
 
     def _generate_examples(self, filepath):
+        lang = self.config.name
         with open(filepath) as f:
             for i, line in enumerate(f):
                 data = json.loads(line)
+                qid = data['query_id'] if lang != 'combined' else f'fake-{i}'
                 for feature in ['negative_passages', 'positive_passages']:
                     if data.get(feature) is None:
                         data[feature] = []
 
-                yield data['query_id'], data
+                yield qid, data