[{'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: [Customized ads] If a user access to an external service provider's services with an external account, that external service provider can link user's device information (ads ID, ads parameter), which has no individual identification, with external service account information to offer customized ads."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Identifier_Ad_ID_3rdParty.'}]