Question: who won the women's wimbledon championship 2015
[{'answer': 'Serena Williams', 'provenance': [{'wikipedia_id': '43631902', 'title': '2015 Wimbledon Championships', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '43631902', 'title': '2015 Wimbledon Championships', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 508, 'bleu_score': 0.890021800494831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8569465695919552717}, 'section': 'Section::::Abstract.'}]}]