Assertion: chloroform | /r/ObjectUse | used in 80 to 95% of all narcoses
Facets:
value: between about 1865
type: TEMPORAL
value: between 1920
type: TEMPORAL
Source sentences:
text: Between about 1865 and 1920, chloroform was used in 80 to 95% of all narcoses performed in the UK and the German-speaking countries.