[{'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: Child Safe App Fruit Ninja Academy: Math Master in-app purchase An in-game system that allows exchanging real money for virtual goods or in-game currency."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]