Question: where does the atp cp system take place
[{'answer': 'in muscle cells', 'provenance': [{'wikipedia_id': '11012831', 'title': 'Bioenergetic systems', 'start_paragraph_id': 5, 'start_character': 106, 'end_paragraph_id': 5, 'end_character': 121, 'bleu_score': 1.0, 'section': 'Section::::Adenosine triphosphate.\n'}]}, {'provenance': [{'wikipedia_id': '11012831', 'title': 'Bioenergetic systems', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 217, 'bleu_score': 0.9466178497997021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4760759507254769476}, 'section': 'Section::::ATP–CP: the phosphagen system.\n'}]}]