#announcer.communicator  someone who proclaims a message publicly
  supertype:  #communicator  a person who communicates with others
  subtype:  #caller.announcer  someone who proclaims or summons in a loud voice; "the callers were mothers summoning their children home for dinner"
  subtype:  #caller-out__caller  a person who announces the changes of steps during a dance; "you need a fiddler and a caller for country dancing"
  subtype:  #muezzin__muazzin__mu'adhdhin  the Moslem official of a mosque who summons the faithful to prayer from a minaret five times a day
  subtype:  #town_crier__crier  (formerly) an official who made public announcements

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