[{'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: Call Block Where a User within the Services reports a phone number as spam, Truecaller stores that phone number in combination with the User's RegisterID in order to maintain the User's spam list online but also for the purpose of building a community based spam blocking directory. On the Android platform, the User can also add a name to the phone number in question that will only be visible to that User."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Contact_Phone_Number_1stParty.'}]