[{'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 Privacy Policy This Privacy Policy is subject to occasional revision, and if we make any material changes in the way we use your personal information, we will notify you by prominently posting notice of the changes on our Site. Any changes to this Privacy Policy will be effective thirty (30) calendar days following our posting of notice of the changes on our Site. These changes will be effective immediately for new users of our Site or App. Changes to this Privacy Policy may affect our use of personal data that you provided us prior to our notification to you of the changes. If you do not wish to permit changes in our use of your personal data, you must notify us prior to the effective date of the changes. Continued use of our Site or App, following notice of such changes shall indicate your acknowledgement of such changes and agreement to be bound by the terms and conditions of such changes."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]