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. 2014 Oct 21;22(e1):e162–e176. doi: 10.1136/amiajnl-2014-002954
(4) treats(X, Y) ∧ occurs_in(Z, X) → treats(infer)(X, Z)
(5) treats(Y, Z) ∧ isa(X, Y) → treats(spec)(X, Z)