[{'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 Privacy Policy We may update our Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]