Assertion: chlorine gas | /r/ObjectUse | used as weapon
Facets:
value: on april
type: TEMPORAL
value: in world war i
type: TEMPORAL
value: by germany
type: OTHER
value: in the second battle of ypres
type: TEMPORAL
value: by the german army
type: OTHER
value: at ypres
type: LOCATION
Source sentences:
text: Chlorine gas was first used as a weapon on April 22, 1915, at Ypres by the German Army.
text: Chlorine gas, also known as bertholite, was first used as a weapon in World War I by Germany on April 22, 1915 in the Second Battle of Ypres.