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Term 1: Term 2:

(subclass MustardGas BlisterAgent) WMD.kif 487-487 Mustard gas is a subclass of blister agent
(subclass SulphurMustardGas MustardGas) WMD.kif 493-493 Sulphur mustard gas is a subclass of mustard gas
(subclass NitrogenMustardGas MustardGas) WMD.kif 498-498 Nitrogen mustard gas is a subclass of mustard gas


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