[{'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\'s Privacy Only persons age 18 or older have permission to access our Service. Our Service does not address anyone under the age of 13 ("Children").'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]