[{'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: Being able to log into your account is one of Tumblr's many great features. Cookies make this possible. Cookies and web tags also let us learn how people use Tumblr, which in turn helps us make a better product for you to use."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Identifier_Cookie_or_similar_Tech_1stParty.'}]