Assertion: mustard gas | /r/ObjectUse | used in the attack
Facets:
value: along with unidentified nerve agents
type: OTHER
Source sentences:
text: A United Nations (UN) medical investigation concluded that mustard gas was used in the attack, along with unidentified nerve agents.
text: A United Nations (UN) medical investigation concluded that mustard gas was used in the attack, along with unidentified nerve agents; the UN's investigator was "unable to obtain any definitive information about the [reported] use of hydrocyanic gas as an aggressive chemical.