[{'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: 27 We offer you choices about receiving personalized advertisements. You can adjust how we personalize advertisements for you by visiting your ads preferences here. You may also generally opt out of receiving personalized advertisements from certain third-party advertisers and ad networks. To learn more about these advertisements or to opt out, please visit the websites of the Digital Advertising Alliance and the Network Advertising Initiative."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]