Question: how long is a tracking number for ups
[{'answer': '18 characters', 'provenance': [{'wikipedia_id': '34232793', 'title': 'Tracking number', 'start_paragraph_id': 4, 'start_character': 297, 'end_paragraph_id': 4, 'end_character': 310, 'bleu_score': 1.0, 'section': 'Section::::Formats.\n'}]}, {'provenance': [{'wikipedia_id': '34232793', 'title': 'Tracking number', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 285, 'bleu_score': 0.834425753491246, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6130768306222557064}, 'section': 'Section::::Formats.\n'}]}]