[{'role': 'user', 'content': "Analyze the following clause from a privacy policy and determine if it's fair or unfair. Also identify any privacy practices mentioned: We do not permanently store the email addresses of users under 13 in a recoverable format and, because we do not retain the email addresses of under-13 users in a usable form after initial registration, we have no means of initiating contact with such users by email after registration. The user name of registered users under 13 is not used as a means to contact such users."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Contact_E_Mail_Address_1stParty.'}]