Question: who shot caesar in dawn of the planet of the apes
[{'answer': 'Koba', 'provenance': [{'wikipedia_id': '36023964', 'title': 'Dawn of the Planet of the Apes', 'start_paragraph_id': 6, 'start_character': 382, 'end_paragraph_id': 6, 'end_character': 386, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}]