changed to input ids

ref_seg_ger.py

@@ -228,6 +228,8 @@ class RefSeg(datasets.GeneratorBasedBuilder):
                             input_ids.append(input_id)
                             labels.append('I-' + row['label'])
                     else:
+                        if tokenized_input == '':
+                            continue
                         for input_id in tokenized_input:
                             input_ids.append(input_id)
                             labels.append('O')