[{'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: Practices specific to Google Play Books The privacy practices that are specific to books on Google Play are: To fulfill contractual commitments to rightsholders who license us books, we enforce certain security limits (for example, to prevent abusive sharing of purchased books and to enforce page view limits on some book previews), and we also enforce limits on the numbers of browsers or devices that can access an account during a given period of time. In order to enforce limits on numbers of devices, we will store the unique ID numbers of your devices on our servers. You can delete a device ID number when you wish to stop using that device."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Identifier_Device_ID_1stParty.'}]