Assertion: b vitamin | /r/HasProperty | isolated
Facets:
value: in 1948
type: TEMPORAL
value: by american chemist karl folkers
type: OTHER
value: by british chemist baron alexander todd
type: OTHER
Source sentences:
text: Vitamin B 12 was first isolated in 1948 by American chemist Karl Folkers and British chemist Baron Alexander Todd.
text: Vitamin B 12 was first isolated in 1948 by American chemist Karl Folkers and British chemist Baron Alexander Todd.