fix bug when reading out of DF

ntcir_13_medweb.py

@@ -372,7 +372,7 @@ class NTCIR13MedWebDataset(datasets.GeneratorBasedBuilder):
             ):
                 yield row_index, {
                     "id": record_id,
-                    "text": tweets,
+                    "text": tweet,
                     "document_id": filepath.stem,
                     "labels": record_labels,
                 }