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Relation: subclass

WaterArea96A body which is made up predominantly of water, e.g. rivers, lakes, oceans, etc.^
FlowRegion20FlowRegion is a class of things whose boundaries are relatively stable but whose constitutive m...^
    StreamWaterArea8A relatively narrow WaterArea where the water flows constantly and in the same direction, e.g. a ...^
        River3River is the class of large streams of fresh water flowing through land into a lake, ocean, or ot...^
        Waterfall.Waterfall is the subclass of StreamWaterAreas where running water falls steeply downhill.^
        Rapids.Rapids is the class of WaterAreas that are parts of a StreamWaterArea where the currents move...^
        RiverMouth.RiverMouth is the subclass of WaterAreas that are the outfalls of a river or stream into anothe...^
        Creek.Creek is the class of small streams of fresh water flowing through land, usually into a River.^

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