[{'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: For example, Personal Information collected during your use of WeChat may be used to suggest particular content that can be made available to you on, or be used to present more relevant advertising to you in, another Tencent service. You may also ask us to migrate or export your Personal Information contained in WeChat to another Tencent service, where such migration option is available."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]