Question: what episode does olivia die in the walking dead
[{'answer': 'Hearts Still Beating', 'provenance': [{'wikipedia_id': '49410376', 'title': 'Olivia (The Walking Dead)', 'start_paragraph_id': 11, 'start_character': 467, 'end_paragraph_id': 11, 'end_character': 487, 'bleu_score': 1.0, 'section': 'Section::::Television series.:Season 7.\n'}]}, {'provenance': [{'wikipedia_id': '49410376', 'title': 'Olivia (The Walking Dead)', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 874, 'bleu_score': 0.9875383322810981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6492193486178782709}, 'section': 'Section::::Television series.:Season 7.\n'}]}]