#fortuity__accident__chance_event  anything that happens by chance without an apparent cause
  supertype:  #happening__occurrence__natural_event__naturalevent  an event that happens
  subtype:  #hap  an accidental happening; "he recorded all the little haps and mishaps of his life"
  subtype:  #happy_chance__happychance__break__good_luck  an unexpected piece of good luck; "he finally got his big break"
  subtype:  #happenstance__coincidence  an event that might have been arranged although it was really accidental
  subtype:  #lottery  something that is regarded as a chance event; "the election was just a lottery to them"

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