Assertion: pneumothorax | /r/CapableOf | occur for obvious reason
Facets:
value: spontaneously
type: MANNER
Source sentences:
text: A Pneumothorax can occur for no obvious reason (spontaneous).
text: A pneumothorax can occur spontaneously with no obvious cause, or it can be caused by:
text: Pneumothorax can also occur spontaneously (without an obvious cause).
text: A Pneumothorax can occur for no obvious reason (spontaneous).