Question: which class in japanese society followed the code of bushido
[{'answer': 'samurai', 'provenance': [{'wikipedia_id': '65734', 'title': 'Bushido', 'start_paragraph_id': 1, 'start_character': 31, 'end_paragraph_id': 1, 'end_character': 38, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]