prompt: Your task is to convert an English description into an ASCII tree format using this style:
  ```
  app
   +--(bar)
   |   `--bar
   `--(foo)
       `--foo
  ```
  
  Convert this description:
  
  dsl is a origin directory that encompasses 3 subdirectories: docbook, links and source.
  At the main level, The 'docbook' folder is vacant.
  In the root directory, The 'links' folder is a vacant space.
  At the top level, 'source' hosts 1 subdirectory elements: model.
  Within directory hierarchy 'source → model', The 'model' directory has been left empty.
  Back to the top level.
  
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "dsl\n +--docbook\n +--links\n `--source\n     `--model", "description": "dsl is a origin directory that encompasses 3 subdirectories: docbook, links and source.\nAt the main level, The 'docbook' folder is vacant.\nIn the root directory, The 'links' folder is a vacant space.\nAt the top level, 'source' hosts 1 subdirectory elements: model.\nWithin directory hierarchy 'source \u2192 model', The 'model' directory has been left empty.\nBack to the top level.\n"}