Question: where does the ball go after a touchback
[{'answer': '25 - yard line'}, {'provenance': [{'wikipedia_id': '966091', 'title': 'Touchback', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 544, 'bleu_score': 0.6503543856010341, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12733219187831465836}, 'section': 'Section::::American football.\n'}]}]