km#knowledge_base_system__KBS
  supertype:  KM_tool__knowledge_management_tool
  part:  KBMS
  subtype:  KBMS
     subtype:  graph_based_KBMS
     subtype:  SNEPSwD
     subtype:  CG_based_KBMS
        subtype:  CGWorld
        subtype:  PROLOG\+CG
        subtype:  CoGITaNT
        subtype:  Notio
        subtype:  WebKB
           subtype:  WebKB-1__WebKB_private_annotation_tool
           subtype:  WebKB-2__WebKB_shared_annotation_tool

4 statements are about indirect instances of knowledge_base_system: graph1_on_WebKB-2, graph6_on_article, graph10_on_article, graph7_on_spamOnly@phmartin.info
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