[{'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: • Choose whether your purchases on Pinterest will be used to customize recommendations and ads for you. You can view and manage your purchase history by going to "Order history" in your account settings, and if you hide a purchase from your history, we won\'t use it to customize Pinterest for you. • Also, we support the Do Not Track browser setting, and you can learn more about how it affects our collection and use of off-Pinterest data.'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]