Assertion: melatonin | /r/HasProperty | undetectable
Facets:
value: during the day
type: TEMPORAL
value: in milk
type: LOCATION
Source sentences:
text: Melatonin was undetectable (<10 ng/L) in milk during the daytime.
text: Melatonin was undetectable during the day, but began to rise at about 8 pm, reaching a peak at about 3 am, and then declining.