[{'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: If material changes are made that impact you, we will notify users by placing a prominent notice at www.blackberry.com/legal. Depending on the circumstances, we may also decide to send users a notice electronically. If you continue to use your BlackBerry Offerings after notice of the change has been given, you will be deemed to have accepted such changes."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]