Assertion: aneurysm's cause | /r/HasProperty | unclear
Facets:
Source sentences:
text: Although what causes this weakness is unclear, smoking and high blood pressure are thought to increase the risk of an aneurysm.
text: The cause of aortic dissection is unclear.
text: Although the exact cause of aortic aneurysms is unclear, risk factors such as smoking, in conjunction with diseases such as hypertension, increase the probability of developing the condition.