fixing some errors

task1a.py

@@ -34,7 +34,7 @@ class Task1a(datasets.GeneratorBasedBuilder):
             # next(csv_reader, None)  # skip the headers
             for id_, row in enumerate(csv_reader):
                 if id_ > 0:
-                    text, label = row
+                    filename, text, label = row
                     current_row = id_, {"text": text, "label": int(label)}
                     if (id_ < train_threshold) & (not is_test):
                         yield current_row