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Term 1: Term 2:

(subclass MustardGas BlisterAgent) WMD.kif 492-492 Mustard gas is a subclass of blister agent
(subclass SulphurMustardGas MustardGas) WMD.kif 498-498 Sulphur mustard gas is a subclass of mustard gas
(subclass NitrogenMustardGas MustardGas) WMD.kif 503-503 Nitrogen mustard gas is a subclass of mustard gas


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