Question: how many juvenile offenders are there in the us
[{'answer': 'approximately 70,800 juveniles were incarcerated', 'provenance': [{'wikipedia_id': '24988116', 'title': 'Youth incarceration in the United States', 'start_paragraph_id': 1, 'start_character': 243, 'end_paragraph_id': 1, 'end_character': 291, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '24988116', 'title': 'Youth incarceration in the United States', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 525, 'bleu_score': 0.9748377259086851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10718719461554281523}, 'section': 'Section::::Abstract.'}]}]