[{'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: Link to Prior Versions You will find a link to prior versions of our Privacy Policy below. We have stored these versions on GitHub, which will also allow you to compare different versions and see what terms have changed: http://github.com/tumblr/policy/commits/master/privacy-policy.txt About Apps Tips Logo Business Buttons Press Info Jobs Developers Terms Copyright Privacy Guidelines Security Merch Global Advertising © Tumblr, Inc. Help About Apps Developers Themes Jobs Legal Terms Copyright Privacy English Deutsch Français Italiano 日本語 Türkçe Español Pусский Polski Português (PT) Português (BR) Nederlands 한국어 简体中文 繁體中文 (台灣) 繁體中文 (香港) Bahasa Indonesia"}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]