[{'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: In iOS operating systems, by clicking on Settings -> General -> About -> Advertising and toggling Limit Ad Tracking to 'ON' (https://support.apple.com/en-us/HT202074). Please note that this will block your phone from receiving tailored ad recommendations across your device"}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]