[{'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: The Service that Vine provides is always evolving and the form and nature of the Service that Vine provides may change from time to time without prior notice to you. In addition, Vine may stop (permanently or temporarily) providing the Service (or any features within the Service) to you or to users generally and may not be able to provide you with prior notice. We also retain the right to create limits on use and storage at our sole discretion at any time without prior notice to you."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]