Question: the only type of articulation with a joint cavity is a
[{'answer': 'synovial joint', 'provenance': [{'wikipedia_id': '210242', 'title': 'Joint', 'start_paragraph_id': 12, 'start_character': 12, 'end_paragraph_id': 12, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Classification.:Structural classification (binding tissue).\n'}]}]