Question: in the movie fences how did troy die
[{'answer': 'heart attack', 'provenance': [{'wikipedia_id': '39565371', 'title': 'Fences (film)', 'start_paragraph_id': 11, 'start_character': 38, 'end_paragraph_id': 11, 'end_character': 50, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '39565371', 'title': 'Fences (film)', 'start_paragraph_id': 11, 'start_character': 31, 'end_paragraph_id': 11, 'end_character': 651, 'bleu_score': 0.888878967948548, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17151378543012930057}, 'section': 'Section::::Plot.\n'}]}]