(subclass Magnet Object) | Cars.kif 3866-3866 | Magnet is a subclass of object |
(subclass NaturalMagnet Magnet) | Cars.kif 3880-3880 | Magnet is a subclass of magnet |
(subclass Electromagnet Magnet) | Cars.kif 3886-3886 | Electromagnet is a subclass of magnet |