[{'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: Signed out. When you are not signed in, Cortana will collect data about how you chat with Cortana and use Cortana to search, using either your voice, inking, or typing. This data includes the following: Speech, inking, and typing. To help Cortana better understand the way you speak and your voice commands, speech data is sent to Microsoft to build speech models and improve speech recognition and user intent understanding. If you choose to sign in, the speech models will become more personalized."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]