#hearer__listener__auditor  someone who listens attentively
  supertype:  #perceiver__observer__beholder  a person who becomes aware (of things or events) through the senses
  subtype:  #eavesdropper  a secret listener to private conversations
  member of:  #audience  a gathering of spectators or listeners at a (usually public) performance; "the audience applauded"; "someone in the audience began to cough"

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