prompt: Your task is to convert the following English description into an ASCII tree format.
  
  db is a fundamental directory that comprises 2 subdirectories: backends and models.
  In the root directory, 'backends' organizes 5 a few folders.
  At level 2, in directory path 'backends → base', Inside 'base', you'll find it has nothing inside.
  In nested path 'backends → mysql', The 'mysql' storage space hasn't been filled with any content.
  At level 2, in directory path 'backends > oracle', The 'oracle' section is barren.
  In nested path 'backends → postgis', Inside 'postgis', you'll find it has no folders inside.
  Within directory hierarchy 'backends > spatialite', The 'spatialite' repository stands empty.
  Back to the top level.
  At the main level, 'models' encompasses 1 nested folders: sql.
  In nested path 'models → sql', Inside 'sql', you'll find it is unpopulated.
  
  
  Format your response in this style:
  ```
  docs
   +--about
   +--advanced
   +--deployment
   +--how-to
   +--learn
   +--resources
   +--security
   `--tutorial
       +--dependencies
       `--security
  ```
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "db\n +--backends\n |   +--base\n |   +--mysql\n |   +--oracle\n |   +--postgis\n |   `--spatialite\n `--models\n     `--sql", "description": "db is a fundamental directory that comprises 2 subdirectories: backends and models.\nIn the root directory, 'backends' organizes 5 a few folders.\nAt level 2, in directory path 'backends \u2192 base', Inside 'base', you'll find it has nothing inside.\nIn nested path 'backends \u2192 mysql', The 'mysql' storage space hasn't been filled with any content.\nAt level 2, in directory path 'backends > oracle', The 'oracle' section is barren.\nIn nested path 'backends \u2192 postgis', Inside 'postgis', you'll find it has no folders inside.\nWithin directory hierarchy 'backends > spatialite', The 'spatialite' repository stands empty.\nBack to the top level.\nAt the main level, 'models' encompasses 1 nested folders: sql.\nIn nested path 'models \u2192 sql', Inside 'sql', you'll find it is unpopulated.\n"}