Assertion: conjugated estrogen | /r/HasProperty | introduced for medical use
Facets:
value: in 1941
type: TEMPORAL
value: in 1942
type: TEMPORAL
value: in the united states
type: LOCATION
Source sentences:
text: Conjugated estrogens was introduced for medical use under the brand name Premarin in Canada in 1941, in the United States in 1942, and in the United Kingdom in 1956.