With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Venice is situated in an enclosed bay.
text_B: Injury of the thoracic aorta refers to any injury which affects the portion of the aorta which lies within the chest cavity .. thoracic aorta. thoracic aorta. aorta. aorta. chest cavity. chest cavity. Injuries of the thoracic aorta are usually the result of physical trauma ; however , they can also be the result of a pathological process .. thoracic aorta. thoracic aorta. aorta. aorta. physical trauma. physical trauma. The main causes of this injury are deceleration -LRB- such as a car accident -RRB- and crush injuries .. deceleration. acceleration. crush injuries. Crush injury
not_related.