text: from typing import List
  
  
  class Role:
      name: str
  
      def __init__(self, name):
          self.name = name
  
  
  class Member:
      name: str
      role: Role
  
      def __init__(self, name, role):
          self.name = name
          self.role = role
  
  
  class Group:
      name: str
      members: List[Member]
  
      def __init__(self, name, members):
          self.name = name
          self.members = members
  
  
  