[{'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: When you take a test in the Duolingo English Test, Duolingo will use your Testing ID, and other information available to Duolingo to validate your actual identity so that we may provide accurate testing results to Score Recipients (as defined below). During the test, we will use your PC's camera and microphone throughout the test to collect a Testing Video. Your User Testing ID will be compared to your Testing Video to ensure that the person who registered for the examination (and whose identity Duolingo has validated) is the same person who took the examination. Testing Video may also be used by our research team for examination validation and improvement purposes."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]