Question: what made up the three tiers of the japanese political system around 1600
[{'answer': 'samurai', 'provenance': [{'wikipedia_id': '21604048', 'title': 'Edo society', 'start_paragraph_id': 5, 'start_character': 101, 'end_paragraph_id': 5, 'end_character': 108, 'bleu_score': 1.0, 'section': 'Section::::Description.\n'}]}, {'answer': 'farming peasants', 'provenance': [{'wikipedia_id': '21604048', 'title': 'Edo society', 'start_paragraph_id': 7, 'start_character': 291, 'end_paragraph_id': 7, 'end_character': 307, 'bleu_score': 1.0, 'section': 'Section::::Four Classes.\n'}]}, {'answer': 'artisans', 'provenance': [{'wikipedia_id': '21604048', 'title': 'Edo society', 'start_paragraph_id': 7, 'start_character': 318, 'end_paragraph_id': 7, 'end_character': 326, 'bleu_score': 1.0, 'section': 'Section::::Four Classes.\n'}]}, {'answer': 'merchants', 'provenance': [{'wikipedia_id': '21604048', 'title': 'Edo society', 'start_paragraph_id': 7, 'start_character': 340, 'end_paragraph_id': 7, 'end_character': 349, 'bleu_score': 1.0, 'section': 'Section::::Four Classes.\n'}]}, {'provenance': [{'wikipedia_id': '21604048', 'title': 'Edo society', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 809, 'bleu_score': 0.983537688954433, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4488336760542957184}, 'section': 'Section::::Four Classes.\n'}]}]