[{'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: We may promote our sites via Internet advertising. If you click on such an advertisement, information such as your mobile device's ID, as permitted by the platform provider, may be sent to the advertising network so that they and United may track the effectiveness of our advertising. This information might also be used for frequency capping, estimating the number of unique users, debugging or security measures and protecting United's interests. You may opt out of the collection of such information by uninstalling the mobile application(s). Once the mobile application(s) has been uninstalled, all information stored in the application will be deleted, including any preferences you previously set or enabled."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Identifier_Device_ID_3rdParty.'}]