Question: who invented the post box in victorian times
[{'answer': 'Richard Redgrave', 'provenance': [{'wikipedia_id': '1354475', 'title': 'Post box', 'start_paragraph_id': 6, 'start_character': 304, 'end_paragraph_id': 6, 'end_character': 320, 'bleu_score': 1.0, 'section': 'Section::::History of post boxes.:Europe.\n'}]}, {'provenance': [{'wikipedia_id': '1354475', 'title': 'Post box', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 1095, 'bleu_score': 0.93502796031982, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3685976437741587778}, 'section': 'Section::::History of post boxes.:Europe.\n'}]}]