Assertion: narcolepsy's onset | /r/AtLocation | narcoleptic horses
Facets:
value: usually
type: TEMPORAL
value: during periods of inactivity
type: TEMPORAL
Source sentences:
text: In narcoleptic horses, the sudden onset of REM sleep usually occurs during periods of inactivity–while the horse is in his stall, at pasture, or standing relaxed in a run-in shed.