Assertion: mustard gas | /r/ObjectUse | used by iraq
Facets:
Source sentences:
text: Although chemical weapons have been used in at least a dozen wars since the end of the First World War, they were not used in combat on a large scale until mustard gas and the more deadly nerve agents were used by Iraq during the 8-year Iran-Iraq war.
text: Although chemical weapons have been used in at least a dozen wars since the end of the First World War,  they were not used in combat on a large scale until mustard gas and the more deadly nerve agents were used by Iraq during the 8-year Iran-Iraq war .