[{'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: Purpose of the use of cookie In case of PC based service, for the purposes to provide the users to optimize services by identifying the user's history of usage and visiting websites, and the user's form of usage and scale, the cookies may be able to be used."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Identifier_Cookie_or_similar_Tech_1stParty.'}]