Question: what body system is the cloaca part of
[{'answer': 'animal anatomy', 'provenance': [{'wikipedia_id': '518211', 'title': 'Cloaca', 'start_paragraph_id': 1, 'start_character': 3, 'end_paragraph_id': 1, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '518211', 'title': 'Cloaca', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 596, 'bleu_score': 0.7330796239631711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5382897075264467219}, 'section': 'Section::::Abstract.'}]}]