Question: what is emily last name in a rose for emily
[{'answer': 'Grierson', 'provenance': [{'wikipedia_id': '2598879', 'title': 'A Rose for Emily', 'start_paragraph_id': 5, 'start_character': 74, 'end_paragraph_id': 5, 'end_character': 82, 'bleu_score': 1.0, 'section': 'Section::::Plot summary.\n'}]}, {'provenance': [{'wikipedia_id': '2598879', 'title': 'A Rose for Emily', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 850, 'bleu_score': 0.9709797067861031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16372524873466624306}, 'section': 'Section::::Plot summary.\n'}]}]