Assertion: narcolepsy's difficulty | /r/CapableOf | maintain alertness
Facets:
value: for long periods of time
type: TEMPORAL
Source sentences:
text: Cataplexy is a major symptom of narcolepsy, a chronic neurological condition that involves other symptoms such as excessive daytime sleepiness – that can result in difficulty focusing and maintaining alertness, along with sleep paralysis and vivid hallucinations when falling asleep or waking
text: As a consequence, people with narcolepsy can be fully alert at times, but have great difficulty sustaining this alertness for long periods of time.