[{'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: You are not required to disclose any personal information in order to download Avast Free Antivirus, Avast Free Mac Security, or Avast Free Mobile Security, and you are permitted to use these programs up to 30 days without registration. Within 30 days, you are required to register your copy of Avast Free Antivirus, Avast Free Mac Security, or Avast Free Mobile Security in order to continue using these programs for up to 12 months. After 12 months re-registration is required. The first time you set up the program you will be required to select a language, and you will be asked if you want to participate in the Avast Community by enabling your computer to provide security-related information on an as-needed basis. Participation in Avast Community is purely voluntary."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]