Question: when did the reconstruction period begin and end
[{'answer': 'January 1 , 1863', 'provenance': [{'wikipedia_id': '55040', 'title': 'Reconstruction era', 'start_paragraph_id': 62, 'start_character': 3, 'end_paragraph_id': 62, 'end_character': 19, 'bleu_score': 1.0, 'section': "Section::::Lincoln's presidential Reconstruction.:Emancipation Proclamation.\n"}]}, {'answer': 'March 31 , 1877'}]