Assertion: narcolepsy | /r/HasProperty | an orexin deficiency syndrome
Facets:
value: as of the early 2000s
type: TEMPORAL
Source sentences:
text: As of the early 2000s, narcolepsy is thought to be an orexin deficiency syndrome; that is, it develops when a person's hypothalamus does not secrete enough orexins to keep the person from falling asleep at inappropriate times.