[{'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 Waze may from time to time change the terms of this Privacy Policy. Substantial changes will take effect 30 days after Waze has posted a: system message to users notifying them of changes to the Privacy Policy; and"}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]