[{'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: ZEN and its partners also collect data to assess general information about the use of products, such as the number of visitors to our sites and services and which sections of a site or service are popular. ZEN also uses this data to provide contextually-relevant advertising to users, to prevent users from seeing the same ad repeatedly, and to allow users to personalize their experience on the site or service (for example, to save a high score in a game). ZEN and its partners may also use cookies, pixels, hardware-based identifiers, Operating System-based identifiers, and software-set identifiers, to manage and measure the performance of advertising."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Identifier_1stParty, Identifier_3rdParty, Identifier_Cookie_or_similar_Tech_1stParty, Identifier_Cookie_or_similar_Tech_3rdParty, Identifier_MAC_1stParty, Identifier_MAC_3rdParty.'}]