Question: the head of the radius articulates with which structure and bone
[{'answer': 'the capitulum of the humerus', 'provenance': [{'wikipedia_id': '15189789', 'title': 'Head of radius', 'start_paragraph_id': 1, 'start_character': 120, 'end_paragraph_id': 1, 'end_character': 148, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '15189789', 'title': 'Head of radius', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 343, 'bleu_score': 0.9684940092844061, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3023705914395562354}, 'section': 'Section::::Abstract.'}]}]