Question: where did the term saved by the bell originate
[{'answer': 'boxing', 'provenance': [{'wikipedia_id': '8279544', 'title': 'Safety coffin', 'start_paragraph_id': 17, 'start_character': 361, 'end_paragraph_id': 17, 'end_character': 367, 'bleu_score': 1.0, 'section': 'Section::::"Saved by the bell" expression.\n'}]}, {'provenance': [{'wikipedia_id': '8279544', 'title': 'Safety coffin', 'start_paragraph_id': 17, 'start_character': 0, 'end_paragraph_id': 17, 'end_character': 519, 'bleu_score': 0.9511135937842321, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6559138753941069679}, 'section': 'Section::::"Saved by the bell" expression.\n'}]}]