Question: where are stem cells made in the body
[{'answer': 'tissues', 'provenance': [{'wikipedia_id': '27783', 'title': 'Stem cell', 'start_paragraph_id': 2, 'start_character': 215, 'end_paragraph_id': 2, 'end_character': 222, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '27783', 'title': 'Stem cell', 'start_paragraph_id': 2, 'start_character': 10, 'end_paragraph_id': 2, 'end_character': 625, 'bleu_score': 0.8592677283165301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7916094104168172489}, 'section': 'Section::::Abstract.'}]}]