[{'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: Collection of Data Log Files To make our apps appealing to users, we must collect data logs about the usage of the app by you. But don't worry, personal data is obfuscated/deleted within the app before we receive it and we tie the data to an ID that cannot be traced back to you."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]