[{'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 this Policy We may revise this statement at any time. We will post any revisions to this policy, and the changes are effective when we post them here. By continuing to access or use the Services after those changes become effective, you agree to be bound by the revised Privacy Policy."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]