Assertion: tabun | /r/HasProperty | discovered by accident
Facets:
value: in january
type: TEMPORAL
Source sentences:
text: Tabun was the first nerve agent to be discovered by accident in January 1936 by the German researcher Gerhard Schrader.
text: The sentence Tabun was the first nerve agent to be discovered by accident in January 1936 is unclear.
text: Tabun was the first nerve agent to be discovered by accident in January 1936 by the German researcher Gerhard Schrader.