| (subclass BlisterAgent ChemicalAgent) | WMD.kif 475-475 | Blister agent is a subclass of chemical agent |
| (subclass MustardGas BlisterAgent) | WMD.kif 492-492 | Mustard gas is a subclass of blister agent |
| (subclass Lewisite BlisterAgent) | WMD.kif 506-506 | Lewisite is a subclass of blister agent |
| (subclass PhosgeneOxime BlisterAgent) | WMD.kif 517-517 | Phosgene oxime is a subclass of blister agent |
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