[{'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: Updates to this Policy From time to time, as our services evolve, we may update this Policy. You agree that we may notify you about material changes in the way we treat personal information by placing a notice on the App. Please check the App frequently for updates."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]