| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 1084-1084 | PopupWindow 是 InterfaceWindow 的 subclass |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 1091-1091 | HoverBox 是 PopupWindow 的 subclass |
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