(subclass SpeakerDevice ElectricDevice) | Mid-level-ontology.kif 26034-26034 | Speaker is a subclass of electric device |
(subclass SpeakerDevice Device) | ComputerInput.kif 475-475 | Speaker is a subclass of device |
(subclass ElectricSpeakerDevice SpeakerDevice) | ComputerInput.kif 484-484 | Electric speaker device is a subclass of speaker |