[{'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: ii. Data collection systems placed by third parties: We authorize some of our commercial partners to place advertising data collection systems on the Site for the same purposes as mentioned above."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]