code: def verify_full_extraction():
      
      path = functions.get_path_from_query_string(request)
  
      if request.method == 'POST':
          rqtasks.extraction_data_statistics(path)
  
      with functions.DBContextManager(path) as session:
          extraction = session.query(models.Extraction).first()
          return jsonify(extraction.data_statistics)
docs: This is an experimental endpoint to simultaneously verify data
      statistics and extraction for training, test, and holdout datasets.
      With this, the other three verification methods will no longer be
      necessary.