[{'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: We may change this Privacy Policy from time to time. If we make changes, we will notify you by revising the date at the top of the policy and, in some cases, we may provide you with additional notice (such as by adding a statement to our homepage or mobile applications or by sending you an email notification). We encourage you to review the Privacy Policy whenever you access the Services to stay informed about our information practices and the ways you can help protect your privacy."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]