[{'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: Revisions to the Privacy Policy We may change this Privacy Policy from time to time. But when we do, we'll let you know one way or another. Sometimes, we'll let you know by revising the date at the top of the Privacy Policy that's available on our website and mobile application. Other times, we may provide you with additional notice (such as adding a statement to our websites' homepages or providing you with an in-app notification)."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]