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Relation: subclass

direct-childrendocumentationgraph
LandForm44A LandForm is the class of geographically and/or geologically distinct areas that occur on Earth'...^
    SlopedArea1A SlopedArea is a land surface which lies at an angle to the horizontal so that some points on it...^
        Cliff.A Cliff is any high, very-steep-to-perpendicular or overhanging face of rock or earth, a precipic...^

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