[{'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: Possible Infringement. If Dropbox believes the Services or Software infringe or may be alleged to infringe a third party's Intellectual Property Rights, then Dropbox may: (a) obtain the right for Customer, at Dropbox's expense, to continue using the Services or Software; (b) provide a non-infringing functionally equivalent replacement; or (c) modify the Services or Software so that they no longer infringe. If Dropbox does not believe the options described in this section are commercially reasonable, then Dropbox may suspend or terminate Customer's use of the affected Services or Software, with a pro-rata refund of prepaid fees for the Services or Software."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]