[{'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: If you want to opt out of behavioural advertising on Mobile or tablet please visit the following websites: http://support.apple.com/kb/HT4228 or https://www.google.com/settings/ads"}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]