Assertion: mediastinum's part | /r/CapableOf | cover the sternum
Facets:
Source sentences:
text: Parietal pleura: Lining the cavities and attached to the thoracic wall, the mediastinum, and the diaphragm, this pleura has four parts: The costal part covers the sternum, ribs and cartilage, intercostal muscles, and sides of the thoracic vertebrae.