#oscillation  the process of oscillating between states
  supertype:  #natural_process__naturalproces__natural_action__naturalaction__action__activity  a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity"
  subtype:  #libration  a real or apparent slow oscillation of a moon or satellite; "the libration of the moon"

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