Question: who won the 2014 australian open women's singles badminton championship
[{'answer': 'Li Na', 'provenance': [{'wikipedia_id': '38460788', 'title': "2014 Australian Open – Women's Singles", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 5, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '38460788', 'title': "2014 Australian Open – Women's Singles", 'start_paragraph_id': 1, 'start_character': 15, 'end_paragraph_id': 1, 'end_character': 281, 'bleu_score': 0.605235306919931, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13532074698596743957}, 'section': 'Section::::Abstract.'}]}]