Question: what is the function of the p53 protein
[{'answer': 'prevents cancer formation', 'provenance': [{'wikipedia_id': '24762', 'title': 'P53', 'start_paragraph_id': 1, 'start_character': 439, 'end_paragraph_id': 1, 'end_character': 464, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '24762', 'title': 'P53', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 796, 'bleu_score': 0.984188478234951, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5228413568556239878}, 'section': 'Section::::Abstract.'}]}]