Question: where can pivot joints be found in the body
[{'answer': 'Proximal radioulnar joint', 'provenance': [{'wikipedia_id': '5522860', 'title': 'Pivot joint', 'start_paragraph_id': 7, 'start_character': 12, 'end_paragraph_id': 7, 'end_character': 37, 'bleu_score': 1.0, 'section': 'Section::::Examples.\n'}]}, {'answer': 'Distal radioulnar joint', 'provenance': [{'wikipedia_id': '5522860', 'title': 'Pivot joint', 'start_paragraph_id': 8, 'start_character': 12, 'end_paragraph_id': 8, 'end_character': 35, 'bleu_score': 1.0, 'section': 'Section::::Examples.\n'}]}, {'answer': 'Median atlanto - axial joint'}]