[{'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 We may change this Privacy Policy from time to time. If we make any changes to this Privacy Policy that we think materially alter your rights, then we will post the latest policy to this site and change the "Last Updated" date above. We encourage you to review this Privacy Policy whenever you visit the PicsArt Service to understand how your personal information is used.'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]