[{'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: Advertising that is customized based on predictions generated from your visits over time and across different websites is sometimes called "online behavioral" or "interest-based" advertising. In accordance with industry self-regulatory principles, we require that companies disclose when they are using online behavioral advertising programs to deliver third-party ads on our sites or collecting information about your visit to our sites for these purposes and give consumers the ability to opt out of this use of their information. You will see an icon'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]