Assertion: melatonin | /r/CapableOf | secrete by the pineal gland
Facets:
value: each night
type: TEMPORAL
Source sentences:
text: Melatonin is a hormone synthesized and secreted by the pineal gland each night that affects the body's circadia rhythm (sleep pattern).
text: In humans, it is the main hormone synthesized and secreted by the pineal gland.