[{'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 this Policy We may revise this Privacy Policy from time to time. The most current version of the policy will govern our use of your information and will always be at https://support.twitter.com/articles/20175155. We will try to notify you of material revisions, for example via the Service or an update to the website. By continuing to access or use the Service after those changes become effective, you agree to be bound by the revised Privacy Policy."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]