[{'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: We may change this Agreement by notifying you of such changes by any reasonable means, including by posting a revised Agreement through the Site. Any such changes will not apply to any claim brought prior to the date on which we posted the revised Agreement incorporating such changes, or otherwise notified you of such changes. Your access to or use of the Site following any changes to this Agreement will constitute your acceptance of such changes. The "Last Updated" legends in each section of the terms and conditions indicate when this Agreement was last changed. We may, at any time and without liability, modify or discontinue all or part of the Site (including access to the Site via any third-party links); charge, modify or waive any fees required to use the Site; or offer opportunities to some or all Site users.'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]