Assertion: mescaline's mescaline | /r/HasProperty | identified as active ingredient
Facets:
value: in the cacti
type: LOCATION
value: in 1897
type: TEMPORAL
value: by german scientist karl heffter
type: OTHER
Source sentences:
text: However, mescaline was only identified as the active ingredient in the cacti in 1897 by German scientist Karl Heffter.