#challenge  a call to engage in a contest or fight
  supertype:  speech_act  the use of language to perform some act
  subtype:  dare__daring  a challenge to do something dangerous or foolhardy; "he could never refuse a dare"
  subtype:  confrontation  a bold challenge
  subtype:  call-out  a challenge to a fight or duel
  subtype:  defiance  a hostile challenge
  subtype:  calling_into_question__demand_for_explanation  a challenge to defend what someone has said
  subtype:  demand_for_identification  as by a sentry

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