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Sigma KEE - Blackboard
Blackboardblackboard, chalkboard

appearance as argument number 1
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(subclass Blackboard DataDisplayDevice) Media.kif 1089-1089 Blackboard is a subclass of DataDisplayDevice
(subclass Blackboard DataStorageDevice) Media.kif 1090-1090 Blackboard is a subclass of DataStorageDevice
(subclass Blackboard DisplayArtifact) Media.kif 1091-1091 Blackboard is a subclass of display artifact

antecedent
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(=>
    (instance ?OBJ Blackboard)
    (color ?OBJ Black))
Media.kif 1097-1099
(=>
    (instance ?OBJ Blackboard)
    (shape ?OBJ Flat))
Media.kif 1093-1095


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