Task: Question Answering
Input (English): Context: Alex the African grey parrot lived and was studied for 30 years before his death last year . His researchers taught him english and then tested his reasoning abilities . In one test Alex was presented with a tray on which lay a green key and a green cup . 
Question: What may be the reason Alex the African Grey was appreciated in life ?
Output (English): The knowledge that was gained by working with him is invaluable .