#crush__jam__press__pres  a dense crowd of people
  supertype:  #crowd  a large number of things or people considered together; "a crowd of insects assembled around the flowers"
  subtype:  #traffic_jam__trafficjam__snarl-up__snarlup  a number of vehicles blocking one another until they can scarcely move
     subtype:  #gridlock  a traffic jam so bad that no movement is possible

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