#elevated_railway__elevated_railroad__el__overhead_railway  an electric elevated railway
  supertype:  #railroad_track__railroad__railway  a line of track providing a runway for wheels; "he walked along the railroad track"
  subtype:  #roller_coaster__big_dipper__bigdipper__chutethechute  elevated railway in an amusement park (usually with sharp curves and steep inclines)

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