| http://www.w3.org/ns/prov#value | - A semantic network can be represented by a directed graph where the nodes are either types or constants and the edges are either labeled with an attribute or with the special label IS-A. To find out, for example, if a particular person in the knowledge base has a certain attribute, a search is commenced at a node representing that person and traveling up the IS-A links until a node is found with a
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