[{'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: Unsubscribe from email communications from us by clicking on the "unsubscribe link" provided in such communications. As noted above, you may not opt out of Service-related communications (e.g., account verification, changes/updates to features of the Service, technical and security notices).'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]