Question: when did nigeria host under 17 world cup
[{'answer': '2009', 'provenance': [{'wikipedia_id': '10244797', 'title': '2009 FIFA U-17 World Cup', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 4, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '10244797', 'title': '2009 FIFA U-17 World Cup', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 137, 'bleu_score': 0.9243880458347601, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1440118272645087190}, 'section': 'Section::::Abstract.'}]}]