Assertion: chemical weapon | /r/ObjectUse | used by the united kingdom
Facets:
value: in world war i
type: TEMPORAL
value: widely
type: DEGREE
Source sentences:
text: Chemical weapons were widely used by the United Kingdom in World War I, and while the use of tear gas was suggested by Churchill and others postwar in Mesopotamia and in World War II, it appears that they were not actually used, although some historians disagree.