[{'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: Changes to this privacy policy This privacy policy was last updated on 17th, november 2012. Our privacy policy may change from time to time. We will update the last modification date whenever we change our policy."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]