[{'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: b) Changes to this Privacy Policy BlackBerry will occasionally update this Privacy Policy so that it remains relevant and current with changing technologies, applicable laws, our evolving business practices and the needs of our users. BlackBerry encourages you to periodically review this Privacy Policy to stay informed of how BlackBerry manages your personal information. If any changes are made to this Privacy Policy, BlackBerry will revise the "Last Updated" date that is indicated on the Privacy Policy.'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]