[{'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: 21.8 Changes to this section: We will provide 60-days' notice of any changes to this Section. Changes will become effective on the 60th day and will apply prospectively only to any claims arising after the 60th day."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]