[{'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: As set out in the terms and conditions relating to our Services, you must be at least 13 years old to access and/or use our Services. We do not knowingly collect personal data about children under the age of 13."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]