[{'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: Choose or Opt Out Trial or Demo Customers: If you submit your e-mail address for a trial or demo version of DataViz software, you may receive one or more promotional e-mails from DataViz. Any promotional e-mail you receive will include options to unsubscribe."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Contact_E_Mail_Address_1stParty.'}]