Question: when did north korea conduct its first nuclear test
[{'answer': 'October 9 , 2006', 'provenance': [{'wikipedia_id': '7360824', 'title': '2006 North Korean nuclear test', 'start_paragraph_id': 38, 'start_character': 242, 'end_paragraph_id': 38, 'end_character': 258, 'bleu_score': 1.0, 'section': 'Section::::Test site location.\n'}]}, {'provenance': [{'wikipedia_id': '7360824', 'title': '2006 North Korean nuclear test', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 117, 'bleu_score': 0.9067110266941041, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12321197005943603370}, 'section': 'Section::::Abstract.'}]}]