[{'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: 2.4 Baidu will collect a Baidu User's personal information when he/she registers to be a Baidu User, uses Baidu's products or services, browses a Baidu page, or participates in promotions and sweepstakes. The information will be utilized to improve the services and web content provided for the user."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]