[{'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: Children Due to the nature of our services, United will collect and maintain travel information, about children under the age of 13 when necessary to comply with federal aviation or security regulations, for safety or security reasons, or as otherwise necessary for United to provide transportation or other services requested."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]