Question: what are the last four digits in a zip code
[{'answer': 'the box number', 'provenance': [{'wikipedia_id': '51550', 'title': 'ZIP Code', 'start_paragraph_id': 19, 'start_character': 173, 'end_paragraph_id': 19, 'end_character': 187, 'bleu_score': 1.0, 'section': 'Section::::History.:ZIP+4.\n'}]}, {'provenance': [{'wikipedia_id': '51550', 'title': 'ZIP Code', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 617, 'bleu_score': 0.924932142113814, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11407431946030356741}, 'section': 'Section::::History.:ZIP+4.\n'}]}]