(subclass Erosion Removing) | Geography.kif 2674-2674 | Erosion is a subclass of removing |
(subclass Erosion GeologicalProcess) | Geography.kif 2675-2675 | Erosion is a subclass of geological process |
(subclass SoilErosion Erosion) | Geography.kif 2945-2945 | Soil erosion is a subclass of erosion |