answer_header = ['id', 'submission_time', 'vote_number', 'question_id', 'message', 'image']
question_header = ['id', 'submission_time', 'view_number', 'vote_number', 'title', 'message', 'image']
order_directions = ['descending', 'ascending']
order_parameter =['submission_time', 'view_number', 'vote_number']