Assertion: melatonin | /r/HasProperty | manufactured by the pineal gland
Facets:
value: in the brain
type: LOCATION
value: from tryptophan
type: LOCATION
Source sentences:
text: Melatonin is a hormone manufactured by the pineal gland, a gland located in the middle of the brain.
text: It is manufactured from tryptophan by the pineal gland in the brain and secreted in small amounts.