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:
  
  backend-integration is a principal directory that comprises 3 subdirectories: __tests__, dir and frontend.
  In the root directory, '__tests__' hasn't been filled with any content.
  At the main level, Inside 'dir', you'll find it is empty.
  In the root directory, 'frontend' encapsulates 3 subdirectories: entrypoints, images, styles.
  Within directory hierarchy 'frontend / entrypoints', 'entrypoints' incorporates 1 contained folders: nested.
  Within directory hierarchy 'frontend > entrypoints > nested', The 'nested' data structure has nothing inside.
  At level 2, in directory path 'frontend > images', 'images' is empty.
  Within directory hierarchy 'frontend / styles', Inside 'styles', you'll find it is a vacant space.
  
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "backend-integration\n +--__tests__\n +--dir\n `--frontend\n     +--entrypoints\n     |   `--nested\n     +--images\n     `--styles", "description": "backend-integration is a principal directory that comprises 3 subdirectories: __tests__, dir and frontend.\nIn the root directory, '__tests__' hasn't been filled with any content.\nAt the main level, Inside 'dir', you'll find it is empty.\nIn the root directory, 'frontend' encapsulates 3 subdirectories: entrypoints, images, styles.\nWithin directory hierarchy 'frontend / entrypoints', 'entrypoints' incorporates 1 contained folders: nested.\nWithin directory hierarchy 'frontend > entrypoints > nested', The 'nested' data structure has nothing inside.\nAt level 2, in directory path 'frontend > images', 'images' is empty.\nWithin directory hierarchy 'frontend / styles', Inside 'styles', you'll find it is a vacant space.\n"}