Question: where is vitamin d produced in the body
[{'answer': 'the skin', 'provenance': [{'wikipedia_id': '24998247', 'title': 'Vitamin D', 'start_paragraph_id': 2, 'start_character': 75, 'end_paragraph_id': 2, 'end_character': 83, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '24998247', 'title': 'Vitamin D', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 443, 'bleu_score': 0.523763046130567, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14298569625829992408}, 'section': 'Section::::Abstract.'}]}]