Question: what is the anatomical name for the elbow joint
[{'answer': 'synovial hinge joint', 'provenance': [{'wikipedia_id': '19595436', 'title': 'Elbow', 'start_paragraph_id': 1, 'start_character': 227, 'end_paragraph_id': 1, 'end_character': 247, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]