[{'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: Changes to Our Privacy Policy We reserve the right to modify this Privacy Policy at any time, so we encourage you to review it frequently. You should periodically check this privacy page for updates. Your continued use of the Services signifies your acceptance of our Privacy Policy as modified"}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]