(subclass DustStorm Storm) | Weather.kif 1253-1253 | Dust storm is a subclass of storm |
(subclass SandStorm DustStorm) | Weather.kif 1298-1298 | Sand storm is a subclass of dust storm |
(subclass Haboob DustStorm) | Weather.kif 1310-1310 | Haboob is a subclass of dust storm |