[{'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: Waze may also establish and require from time to time additional or different means of identification and authentication for logging in and accessing the Services or for accessing certain features or designated sections of the Services."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]