[{'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: 4.9 Baidu is entitled to modify or terminate this service (or any other parts thereof) at any time temporarily or permanently without prior notice. Baidu is not liable to users or any third party given any modification or termination of service with or without notice."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]