Question: when was 100 naira note introduced in nigeria
[{'answer': '1999', 'provenance': [{'wikipedia_id': '178686', 'title': 'Nigerian naira', 'start_paragraph_id': 18, 'start_character': 207, 'end_paragraph_id': 18, 'end_character': 211, 'bleu_score': 1.0, 'section': 'Section::::History.:Banknotes.\n'}]}, {'provenance': [{'wikipedia_id': '178686', 'title': 'Nigerian naira', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 284, 'bleu_score': 0.965203995518735, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10665277908439366624}, 'section': 'Section::::History.:Banknotes.\n'}]}]