[{'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: Comcast participates in the World Wide Web Consortium\'s (W3C) process to develop a "Do Not Track" standard. Given that the definitions and rules for such a standard have not yet been defined, Comcast does not yet respond to "Do Not Track" signals sent from browsers.'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]