[{'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: Access and controls. You can review, edit or delete your HealthVault account data, or close your HealthVault account at any time. Only custodians can permanently delete an item. When you delete a heath record, it is deleted from all users who had access to it."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]