[{'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: Please check back from time to time to ensure you are aware of these changes. In the event that we change this Privacy Policy, your continued use of the Sites will signify your acceptance of the modified Privacy Policy."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]