[{'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: 13.2 How we use cookies and other technologies We use both session cookies (which expire once you close your web browser) and persistent cookies (which stay on your device for a set period of time or until you delete them). We use the following types of cookies for the purposes explained in this chart: Cookie Type Purpose Essential Operational These cookies are necessary to allow us to operate the Spotify Service as you have requested. For example, they let us recognise what type of subscriber you are and then provide you with services accordingly."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Identifier_Cookie_or_similar_Tech_1stParty.'}]