[{'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: "Refer a friend." There may be times when we post a "refer a friend" link that allows a site visitor to request that we send a message to a friend about an Avast product or service. You may request us to send a message only to those of your friends who have agreed to receive a message about an Avast product or service from us. We will respond by sending a single email message to the address provided. Contact with the friend will be by email only; we will never request that our users provide a friend\'s phone number or other contact information. We will not make any record of the email address that is provided, and after sending a single message we will not contact the friend again in response to the "refer a friend" request.'}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Contact_1stParty, Contact_Phone_Number_1stParty.'}]