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KB:
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Formal Language:
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CompoundSubstance
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| appearance as argument number 1 |
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| appearance as argument number 2 |
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| antecedent |
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| (=> (instance ?REL QuaternaryPredicate) (valence ?REL 4)) |
Merge.kif 3620-3622 | If X is an instance of quaternary predicate, then X has 4 argument(s) |