Task: Question Answering
Input (English): Context: I was out for a cigarette about twenty minutes ago and two cockatoo 's came and flew onto the patio roof ! Sydeny went balistic in a happy way ( he was going " HELLO ! HELLOOOOO ! ! ! ). 
Question: Why might Sydeny be so happy about the cockatoos ?
Output (English): Because it 's rare to see cockatoos flying freely because they 're kept as pets .