Assertion: pvc | /r/HasProperty | discovered on at least two occasions
Facets:
value: by eugen baumann
type: OTHER
value: in the 19th century
type: TEMPORAL
value: by henri victor regnault
type: OTHER
value: in 1872
type: TEMPORAL
value: accidentally
type: MANNER
Source sentences:
text: Polyvinyl chloride was accidentally discovered on at least two occasions in the 19th century, first in 1838 by Henri Victor Regnault and in 1872 by Eugen Baumann.