Question: who is the actor who plays captain america
[{'answer': 'Christopher Robert Evans', 'provenance': [{'wikipedia_id': '1535704', 'title': 'Chris Evans (actor)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1535704', 'title': 'Chris Evans (actor)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 235, 'bleu_score': 0.754979164500849, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5833609607422683965}, 'section': 'Section::::Abstract.'}]}]