Question: nagaland was formed in 1963. which state was it a part of earlier
[{'answer': 'Assam', 'provenance': [{'wikipedia_id': '408677', 'title': 'Nagaland', 'start_paragraph_id': 1, 'start_character': 67, 'end_paragraph_id': 1, 'end_character': 72, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '408677', 'title': 'Nagaland', 'start_paragraph_id': 36, 'start_character': 0, 'end_paragraph_id': 36, 'end_character': 1287, 'bleu_score': 0.9484172939912171, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6921548714066284152}, 'section': 'Section::::History.:Since Indian independence.\n'}]}]