Assertion: tear gas's use | /r/Desires | careful evaluation
Facets:
value: to ensure
type: PURPOSE
Source sentences:
text: The UN Basic Principles on the Use of Force and Firearms by Law Enforcement Officials stipulate that the use of non-lethal incapacitating weapons such as tear gas requires careful evaluation to ensure that “uninvolved persons” are not endangered by their usage, guidance ignored in the subway station attack.