Assertion: narcolepsy | /r/CreatedBy | tumor
Facets:
value: in rare cases
type: OTHER
Source sentences:
text: In rare cases, narcolepsy can be caused by traumatic brain injury, tumors, or other diseases affecting the parts of the brain that regulate wakefulness or REM sleep.  
text: In rare cases, narcolepsy can be caused by traumatic brain injury, tumors, or other diseases affecting the parts of the brain that regulate wakefulness or REM sleep.