[{'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: We reserve the right to request proof of age at any stage to verify that minors under the age of thirteen (13) are not using the Service. If you are under the age of thirteen (13), you may not download the Software or use the Service including the Software, you may not use any feature of the Service that requires registration, and you may not provide us with any Received Information. CallApp will not knowingly collect any Received Information concerning children under the age of thirteen (13)."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]