Question: when did nigeria got her independent and republic
[{'answer': '1963', 'provenance': [{'wikipedia_id': '9795560', 'title': 'First Nigerian Republic', 'start_paragraph_id': 1, 'start_character': 68, 'end_paragraph_id': 1, 'end_character': 72, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '9795560', 'title': 'First Nigerian Republic', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 127, 'bleu_score': 0.8970773746801091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16861809856602899884}, 'section': 'Section::::Abstract.'}]}]