Question: who is man of the series in ipl 2017
[{'answer': 'Ben Stokes', 'provenance': [{'wikipedia_id': '51776191', 'title': '2017 Indian Premier League', 'start_paragraph_id': 2, 'start_character': 297, 'end_paragraph_id': 2, 'end_character': 307, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '51776191', 'title': '2017 Indian Premier League', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 427, 'bleu_score': 0.845120035878932, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10256723608115814657}, 'section': 'Section::::Abstract.'}]}]