Question: who won the match mumbai vs chennai super king
[{'answer': 'Mumbai Indians', 'provenance': [{'wikipedia_id': '42822838', 'title': 'Chennai Super Kings–Mumbai Indians rivalry', 'start_paragraph_id': 0, 'start_character': 20, 'end_paragraph_id': 0, 'end_character': 34, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]