Answer:
I'm not sure, maybe try googling this, it seems like a better fit.
Explanation:
 
        
             
        
        
        
The "Copper" was used by the First Nations people as a form of money and	wealth. It was made out of "Native" copper which was found in the land where	they lived, and superficially resembled a shield. Considered very rare and	hard to obtain, raw copper was traded from the Athabaskan Indians in the	Interior Plains, or from the white man in later times.   
        
                    
             
        
        
        
I believe John Cage is linked with aleatoric music. 
Hope I helped! :)