[{'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: (b) Improve our Services: We use call log information and usage information (as described above) to better understand network behavior and trends (numbers of messages and calls made by users, typical destinations, call lengths, network type, etc.), detect potential outages and technical issues (this helps us notice things like a drop in call volume in a certain geography, a shift in call length, a change in typical networks, etc.) to improve our Services. We may look into a specific call log in response to a customer support request. We maintain call log information for only as long as is needed for business and/or legal purposes. We use aggregate information about our users and non-personal information to analyze our Services and user behavior and prepare aggregated reports."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Location_1stParty.'}]