[{'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 Although our Service is a general audience Service, we restrict the use of our service to individuals age 18 and above. We do not knowingly collect, maintain, or use personal information from children under the age of 18."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]