[{'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: In order to enable consistent reading position across devices and provide useful navigation within a book, we store the last five pages (only) in each book a user has viewed with the user's account. We also store pages viewed for security monitoring and/or if the user elects to use the Web History service."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]