[{'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 This privacy policy may be modified from time to time. When changes are significant, we will notify you by publishing the notice in our blog at http://blog.zello.com/. iPhone Android Windows Phone beta signup BlackBerry Public Channels Support Accessories ZelloWork Privacy Terms of Service Press Jobs Blog Contact Team"}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]