Question: who was named sole heir after caesar’s assassination
[{'answer': 'his grandnephew Gaius Octavius', 'provenance': [{'wikipedia_id': '15775663', 'title': 'Assassination of Julius Caesar', 'start_paragraph_id': 23, 'start_character': 881, 'end_paragraph_id': 23, 'end_character': 911, 'bleu_score': 1.0, 'section': 'Section::::Aftermath.\n'}]}, {'provenance': [{'wikipedia_id': '15775663', 'title': 'Assassination of Julius Caesar', 'start_paragraph_id': 23, 'start_character': 0, 'end_paragraph_id': 23, 'end_character': 1775, 'bleu_score': 0.9759256239684501, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9744507429302198675}, 'section': 'Section::::Aftermath.\n'}]}]