Question: when did sikkim became a part of north east india
[{'answer': '2002', 'provenance': [{'wikipedia_id': '602639', 'title': 'Northeast India', 'start_paragraph_id': 2, 'start_character': 289, 'end_paragraph_id': 2, 'end_character': 293, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '602639', 'title': 'Northeast India', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 377, 'bleu_score': 0.9679895851501501, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16812290548902274111}, 'section': 'Section::::Abstract.'}]}]