Question: who was the first indian who win world junior badminton championship
[{'answer': 'Nehwal', 'provenance': [{'wikipedia_id': '5322451', 'title': 'Saina Nehwal', 'start_paragraph_id': 0, 'start_character': 6, 'end_paragraph_id': 0, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5322451', 'title': 'Saina Nehwal', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 842, 'bleu_score': 0.8848133580734621, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17237286488690600793}, 'section': 'Section::::Abstract.'}]}]