Question: who plays vision in avengers age of ultron
[{'answer': 'Paul Bettany', 'provenance': [{'wikipedia_id': '200563', 'title': 'Paul Bettany', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '200563', 'title': 'Paul Bettany', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 699, 'bleu_score': 0.7332757814039831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10210507397874458376}, 'section': 'Section::::Abstract.'}]}]