[{'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: Additional Information: You may choose to provide us with additional information to help improve and personalize your experience across our Services. For example, you may choose to upload and sync your address book so that we can help you find and connect with users you know or help other users find and connect with you. We may later tailor content, such as making suggestions or showing user accounts and Tweets for you and other users, based on imported address book contacts. You can delete your imported address book contacts at any time by visiting your Contacts Dashboard in your privacy settings. If you email us, we may keep your message, email address and contact information to respond to your request. If you connect your account on our Services to your account on another service in order to cross-post between our Services and that service, the other service may send us your registration or profile information on that service and other information that you authorize. This information enables cross-posting, helps us improve the Services, and is deleted from our Services within a few weeks of your disconnecting from our Services your account on the other service."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Contact_Address_Book_1stParty.'}]