Question: what happened to alfred in the dark knight returns
[{'answer': 'dying of a stroke', 'provenance': [{'wikipedia_id': '73243', 'title': 'The Dark Knight Returns', 'start_paragraph_id': 9, 'start_character': 627, 'end_paragraph_id': 9, 'end_character': 644, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '73243', 'title': 'The Dark Knight Returns', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 1096, 'bleu_score': 0.975177107849419, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12022580310883271840}, 'section': 'Section::::Plot.\n'}]}]