[{'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 choices you have. If you are an existing user, you can choose not to have your WhatsApp account information shared with Facebook to improve your Facebook ads and products experiences. Existing users who accept our updated Terms and Privacy Policy will have an additional 30 days to make this choice by going to Settings > Account."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]