Assertion: nitrous oxide | /r/ObjectUse | used as anaesthetic drug
Facets:
value: in the treatment of a patient
type: TEMPORAL
Source sentences:
text: The first time nitrous oxide was used as an anaesthetic drug in the treatment of a patient was when dentist Horace Wells, with assistance by Gardner Quincy Colton and John Mankey Riggs, demonstrated insensitivity to pain from a dental extraction on 11 December 1844.