Question: as caesar is stabbed who says et tu brute
[{'answer': 'Julius Caesar', 'provenance': [{'wikipedia_id': '1865123', 'title': 'Et tu, Brute?', 'start_paragraph_id': 1, 'start_character': 227, 'end_paragraph_id': 1, 'end_character': 240, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]