[{'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 the Privacy Policy. We may change this Privacy Policy from time to time, and all changes will be effective at the time we post them. If we believe there is a significant change to this Privacy Policy or our data collection and use practices, we will indicate on our sites that our Privacy Policy has changed prior to the change becoming effective. The then-posted version of the Privacy Policy supersedes all prior versions. Your continued access to or use of any of our sites shall be deemed your acceptance of the Privacy Policy."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]