[{'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: If you transact with us, we collect some additional information, such as a billing address, a credit / debit card number and a credit / debit card expiration date and/ or other payment instrument details and tracking information."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Contact_Postal_Address_1stParty.'}]