[{'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: b) Turn on "Limit Ad Tracking" on your iOS device or "Opt Out of Interest-Based Ads" on your Android device'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]