[{'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: Return to top Changes to Our Privacy Policy: Digital technology is rapidly evolving. If we decide to change our Privacy Policy in the future, we'll post the changes here and indicate at the top of the policy the last date on which it was updated. Unless otherwise noted, all changes will be effective when posted."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]