[{'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: # More Our privacy policy may change from time to time. When we do, we will revise the "last updated" date at the bottom of the privacy statement. We will obtain your opt-in consent for any updates to this Privacy Policy that materially expand the sharing or use of your personal information in ways not disclosed in this Privacy Policy at the time of collection.'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]