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Sigma KEE - Sunset
KB Term: 

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Sunset
The TimeInterval of each Day when the sun is setting and is partially overlapped by the horizon line.
Relationships      
Parents 時間間隔 An interval of time. Note that a TimeInterval has both an extent and a location on the universal timeline. Note too that a TimeInterval has no gaps, i.e. this class contains only convex time intervals.


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