Assertion: trichloroethylene | /r/ObjectUse | used as general anesthetic
Facets:
value: formerly
type: TEMPORAL
value: until the late 1970’s
type: TEMPORAL
Source sentences:
text: TCE was first produced in the early twentieth century and was used as a general anesthetic until the late 1970’s.
text: TCE was formerly used as a general anesthetic, an alternative to ether or chloroform; as a solvent in dry-cleaning; and to extract oils, caffeine and flavours from plants.