Assertion: l tryptophan | /r/HasProperty | popular sleeping aid
Facets:
value: very
type: DEGREE
value: in the united states
type: LOCATION
Source sentences:
text: L-tryptophan was a very popular sleeping aid in the United States until recently, and was also used for premenstrual syndrome and depression.
text: L-tryptophan was a very popular sleeping aid in the United States until recently, and was also used for premenstrual syndrome and depression.