Question: how many characters in a fedex tracking number
[{'answer': 'between 12 and 14', 'provenance': [{'wikipedia_id': '34232793', 'title': 'Tracking number', 'start_paragraph_id': 3, 'start_character': 49, 'end_paragraph_id': 3, 'end_character': 66, 'bleu_score': 1.0, 'section': 'Section::::Formats.\n'}]}, {'provenance': [{'wikipedia_id': '34232793', 'title': 'Tracking number', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 181, 'bleu_score': 0.833610442344303, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2178558431116883196}, 'section': 'Section::::Formats.\n'}]}]