Question: who becomes captain america after steve rogers dies
[{'answer': 'Bucky Barnes', 'provenance': [{'wikipedia_id': '20831744', 'title': 'The Death of Captain America', 'start_paragraph_id': 3, 'start_character': 526, 'end_paragraph_id': 3, 'end_character': 538, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '20831744', 'title': 'The Death of Captain America', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 904, 'bleu_score': 0.9867102250666441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14762894330498007687}, 'section': 'Section::::Plot.\n'}]}]