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Term 1: Term 2:

(subclass DirectedGraph Graph) Merge.kif 5668-5668 有向图 是 图 的 subclass
(subclass Tree DirectedGraph) Merge.kif 5685-5685 树 是 有向图 的 subclass
(subclass GraphPath DirectedGraph) Merge.kif 5718-5718 图路径 是 有向图 的 subclass


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