Question: who supervised elections in the south during reconstruction
[{'answer': 'Andrew Johnson', 'provenance': [{'wikipedia_id': '55040', 'title': 'Reconstruction era', 'start_paragraph_id': 4, 'start_character': 107, 'end_paragraph_id': 4, 'end_character': 121, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '55040', 'title': 'Reconstruction era', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 1026, 'bleu_score': 0.714837105947912, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15376257539919637083}, 'section': 'Section::::Overview.\n'}]}]