#case.happening__instance__example  an occurrence of something; "it was a case of bad judgment"; "another instance occurred yesterday"; "but there is always the famous example of the Smiths"
  supertype:  #happening__occurrence__natural_event__naturalevent  an event that happens
  subtype:  #time.case__clip  an instance or single occasion for some event; "This time he succeeded"; "He called four times"; "he could do ten at a clip"
  subtype:  #piece.case__bit  an instance of some kind; "it was a nice piece of work"; "he had a bit of good luck"

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