Assertion: mediastinum's heart | /r/AtLocation | the mediastinum
Facets:
Source sentences:
text: The thoracic cavity contains the lungs and the heart, which is located in the mediastinum.
text: The thoracic cavity contains the lungs and the heart, which is located in the mediastinum.
text: The thoracic cavity contains the lungs and the heart, which is located in the mediastinum.