[{'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: USE OF INFORMATION OBTAINED BY DUOLINGO We may use your contact information to send you notifications regarding new services offered by Duolingo that we think you may find valuable. Duolingo may also send you service-related announcements from time to time through the general operation of the Service. Generally, you may opt out of such emails."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Contact_1stParty.'}]