Assertion: melatonin's cycle | /r/HasProperty | influenced by 2 factors
Facets:
Source sentences:
text: The daily sleep-wake cycle is influenced by 2 factors: process C (circadian), an endogenous “clock” that drives the rhythm of the sleep-wake cycle; and process S (sleep), a homeostatic “sleep propensity” that determines the recent amount of sleep and wakefulness accumulated.