Question: which part of the scapula serves as an attachment site for both the rhomboids and serratus anterior
[{'answer': 'medial border', 'provenance': [{'wikipedia_id': '211386', 'title': 'Scapula', 'start_paragraph_id': 24, 'start_character': 144, 'end_paragraph_id': 24, 'end_character': 157, 'bleu_score': 1.0, 'section': 'Section::::Structure.:Angles.\n'}]}]