[{'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: Your messages are yours, and we can't read them. We've built privacy, end-to-end encryption, and other security features into WhatsApp. We don't store your messages once they've been delivered. When they are end-to-end encrypted, we and third parties can't read them."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]