Question: when did children's health insurance program start
[{'answer': '1997', 'provenance': [{'wikipedia_id': '635422', 'title': "Children's Health Insurance Program", 'start_paragraph_id': 1, 'start_character': 499, 'end_paragraph_id': 1, 'end_character': 503, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]